The RotoBaller MLB writing team did a recent 2021 fantasy baseball mock draft for roto mixed leagues. Today Jamie Steed looks at each manager's best value pick.

The draft is the most exciting date on the fantasy baseball calendar, as the decisions you make during the draft set the table for your season.

• True story: I looked at my fantasy baseball sleepers from last year and decided since I wrote a Ryan Yarbrough sleeper last year, I wouldn’t write one this year, and instead focused on Chris Bassitt, who I wrote as a ‘guy to target’ but necessarily a full sleeper post.Coming off such a weird year, it’s honestly difficult to have my opinions on starters change that dramatically.
• More importantly, fantasy baseball draft season is now upon us. I am not one for paying large amounts of attention to positional rankings. Knowing who is valued as the 7 th best shortstop, or who the 11 th ranked second baseman is – is helpful no doubt, but that alone will not win you your fantasy leagues.
• Fantasy Baseball Sleepers. First, let's define sleepers and the players we're identifying. For this article, we're analyzing five sleeper hitters that seem to fly under the radar and thus need more love. As a starting point, we'll use NFBC ADP over the past month beyond pick 200.

Are you prepared to find the hidden gems that will set your team apart? Have you scouted the next superstar waiting to rise to the top of the Player Rater? Can you navigate the player pool and avoid the busts that will leave you with regrets all season long?

Below, our experts predict the players they consider to be sleepers, breakouts and busts for the 2018 season. Here's a quick guide to what we mean by these categories ...

Sleeper: A player set to exceed the value implied by his average draft position. Each analyst has provided an early-round sleeper, a midround sleeper and a sleeper you can find at the end of your drafts.

Breakout: A player poised to enter the upper echelon of the fantasy game via a big step forward, reaching a new level of play for the first time in his career. Our analysts have picked an early breakout player who could deliver first-round value, a midround sleeper who could return value of a top-50 player and a rookie who could jump straight to fantasy stardom.

2018 Sleepers Fantasy Baseball Sleepers

Bust: A player who will disappoint relative to his average draft position. Our experts have picked players set to disappoint as expected first-round selections, disappointments in the early to middle rounds and rookies who won't live up to expectations.

Yoan Moncada: Moncada boasts power, speed, plate discipline, a middle-infield starting spot and a place near the top of a potentially interesting lineup, all at age 22. OK, he could have been better last year, but he was still a rookie. This is a 20-homer, 30-steal profile, at least, and even if he hits only .260 or so thanks to the strikeouts, that makes him a top-100 player with the potential for considerably more, considering he can contribute in every offensive category. The breakout is still coming! -- Eric Karabell

Manuel Margot: Margot always profiled as a leadoff option with stolen base potential, and then in his rookie season, he swatted 13 home runs in 126 games as well. The Padres should score many more runs than they did in 2017, and Margot at the top is key as a potential five-category option. Margot was not supposed to hit for much power, but the underlying figures show that his rookie power was legit. Margot is certainly capable of more than 30 stolen bases, with expected gains in batting average and runs pending as well. -- Eric Karabell

Bryce Harper: Harper has achieved historic numbers, with 150 home runs before turning 25, but he is a risk in Round 1. Durability is a problem, but the numbers are inconsistent as well. Sure, Harper could hit 50 home runs ... but he has topped 30 once in six seasons. He could win a batting title ... but he has hit .275 twice. Finally, Harper attempted all of six stolen bases last season. It would not be surprising if Harper matches his 2015 MVP campaign and tops Mike Trout in value ... but it is fair to point out that Harper has reached expectations in only one of his six seasons for fantasy. -- Eric Karabell

Byron Buxton: Some might claim he already 'broke out,' as Buxton's .300/.347/.546 slash rates, 11 home runs and 13 stolen bases in 57 games played after the All-Star break made him a top-40 performer in terms of fantasy baseball earnings, but to this point of his career, including that stretch, he has been a wildly unpredictable performer. One of the reasons I believe in Buxton's strong finish -- and note, I expect him to regress to closer to a .260 batting average but with similar power/speed -- is that a significant tweak to his batting stance fueled much of it. -- Tristan H. Cockcroft

Willie Calhoun: There's always a rookie who comes from nowhere to put forth near-Rookie of the Year numbers, and the ones I typically draft possess high floors, likely to translate smoothly to the big leagues, and are rarely noticed. Calhoun fits the bill: He's a virtual lock to start -- or at least be on the strong side of a platoon -- in left field for the Texas Rangers, and he was one of three players in pro ball last season with at least 30 home runs and an 85 percent contact rate (along with Francisco Lindor and Joey Votto). -- Tristan H. Cockcroft

Alex Reyes: While I like Reyes' skill set a lot -- he'll be someone I acquire in dynasty formats -- his 2018 role is uncertain, as it's his first year following Tommy John surgery, and he has never exceeded 111 1/3 innings in a single pro year. Coming off a year in which the multi-inning reliever was back in vogue, especially during the postseason, Reyes makes a heckuva lot of sense to the St. Louis Cardinals in a Chris Devenski-esque role as he works his way back. That, unfortunately, is a role of limited fantasy appeal. -- Tristan H. Cockcroft

Matt Duffy: Here's a guy who finished second in the Rookie of the Year voting in 2015 behind Kris Bryant. In 2016, he was traded to the Rays for the stretch drive but almost immediately got hurt and then had to sit out all of last season due to surgery. All signs point to Duffy being 100 percent healthy headed into 2018, and Tampa Bay has doubled-down on the third baseman, having traded Evan Longoria to the Giants. If everything clicks, we could have 20-20 production from a guy who might not even show up on some fantasy draft lists due to the goose egg in stats he had in 2017. That's not too shabby. -- AJ Mass

Luis Castillo: In his final five starts of the 2017 season, Castillo had a 1.86 ERA, a .158 BAA and a 12.1 K/9. He has a fastball that averages 97.5 mph and clearly was able to adjust to the majors after his leap from Double-A in June after a rocky start (4.05 ERA, .243 BAA in his first seven starts of the season). Sure, he could flame out like far too many young arms before him. However, it's also not unrealistic that he'll finish the season in the top five in strikeouts, with an ERA around 3.00 and at least a dozen wins under his belt. I'd call that a breakout. -- AJ Mass

Tyler Chatwood: We always upgrade hitters in a big way when they go to Colorado, so why do we not treat pitchers leaving the thin air with similar levels of excitement? Over the past two seasons, Chatwood's road ERA is lower than that of Max Scherzer and Chris Sale. Heard of those guys? I'm not saying he is on that level, but for those of you who draft an ace to lead your staff and then wait on pitching ... Chatwood should be on your radar. -- Kyle Soppe

Elvis Andrus: None of his production from last season is going to help you this year, so be careful about how high you draft him. Andrus' stock skyrocketed last season thanks in large part to 20 homers ... or, you know, three more than he hit in the previous three seasons combined. He has been successful on less than 71 percent of his stolen base attempts the past four seasons, so I worry that both his ceiling and his floor aren't as high as most seem to be assuming. -- Kyle Soppe

Alex Bregman: It's easy to find power in today's fantasy baseball landscape. Everything else seems to come at a premium. As such, a player who can do 'everything else' while essentially keeping up with the power guys is incredibly valuable. Enter Bregman, who was fantastic during the second half of last season, finishing with a post-All-Star break wRC+ on par with names such as Arenado, Judge and Lindor. He's delivering on his prospect promise and should take another step forward in 2018. -- Leo Howell

Not all leagues are 10-team standard mixed.

There are 12-, 15- and 20-team mixed leagues, including those that draft as many as 50 players to a roster rather than the traditional 25. There are 'only' leagues, in which the player pool is divided among only American or National League players. Nowadays, if you can think of a fantasy baseball format, there's probably a league for it somewhere.

Among my favorites are those AL- and NL-only 12-team leagues, where we're scraping the bottom of the barrel to find hidden value. Practically everyone even remotely relevant gets drafted in those, so you're challenged to unearth talent from beyond the All-Star tiers in the rankings. Doing the research on these effective no-names is one of my most enjoyable offseason exercises.

These gems I find I call my 'Deep sleepers,' since they're the types of players who actually fit the 'sleeper' definition: They're players no one expects to contribute much, but whom I think can provide good results.

As has been the case in seasons past, my goal with these picks is for the players to earn at least $10 of fantasy value in 'only' leagues. That might not sound like much if you do play in the aforementioned 10-team standard mixed, but it's still a threshold where the player could become a viable option for you as a midseason pickup. If you're in said league, print this list out and keep it tucked away for later.

Franklin Barreto, 2B, Oakland Athletics

His pro-career path reminds me a lot of Rougned Odor's -- hitters who were much more contact/line drive-oriented during their minor league days who subsequently sold out for power at the big-league level. Barreto simply hasn't enjoyed the amount of opportunity that Odor has to date, with only 57 games and 151 trips to the plate on his big-league résumé. Barreto's power metrics in that limited sample are awfully interesting, though: He has seven home runs, .208 isolated power, a 31.8 percent fly-ball rate and Statcast metrics showing a 41.5 percent hard-contact rate and 23.2 degree launch angle. Players like this require more time than others to fully adapt at the big-league level due to the extensive changes to their approach, and I'm unwilling to forget that Barreto was a top-40 overall prospect as recently as 2016, with much of the reason for that lofty ranking centering upon things that weren't his power potential. If the Athletics can squeeze him onto their roster as a utilityman come Opening Day, I think they'll find ways to use him enough to matter.

Price point in LABR: Second-round reserve pick.

Ty Buttrey, RP, Los Angeles Angels

If you read my 'Not on my team!' column, you already know I'm not a big believer in Cody Allen's skill set, and therefore his prospects of holding a closer role for another 162-game schedule. Buttrey therefore seems like one of the most obvious -- and necessary -- handcuff candidates among setup men, after flashing 28.6 percent strikeout and 57.8 percent ground-ball rates in 16 appearances for the big club following his acquisition in the deadline Ian Kinsler deal. This isn't to say Allen shouldn't open the year in the role, as Buttrey could stand to polish his slider, which generated a 25 percent swinging-strike rate but he placed in the rulebook strike zone only 38 percent of the time, not to mention show that his improved overall control wasn't a mere small-sample blip. Buttrey seems to have future-closer stuff, though, and after Allen it's a wide-open race in the Angels' bullpen.

Price point in LABR: $1.

Steven Duggar, OF, San Francisco Giants

He's a speedy player with a hint of pop, and has an excellent opportunity this spring to carve out a prominent role for what is a Giants team precariously thin on quality outfielders. Duggar began his pro career as more of a light-hitting speedster, but the team worked with him on elevating his launch angle in the upper minors, to the point that he posted a 37.7 percent fly-ball rate in his career at the Triple-A level (2017-18) and 34.4 percent in his brief stint for the big club last year, giving him a chance at a double-digit home run output if he gets regular at-bats. Better yet: He has been batting leadoff in the games he has started this spring, and is the odds-on-favorite to capture that role on Opening Day should he claim the starting center field role, things that will only benefit him in terms of plate appearances and with them stolen base opportunities and runs scored. Duggar could be a sneaky 10/25 player in the best-case scenario.

Price point in LABR: $2.

Phillip Ervin, OF, Cincinnati Reds

While he finished last season with a mere .192 batting average in September, Ervin's second half to 2018 couldn't be characterized as anything but encouraging: He batted .263/.327/.441 with seven home runs and five stolen bases in 59 games following his mid-July promotion. He's off to a scorching start this spring, too, which is something he needed to do in order to lock down a role on a Reds team that is loaded with options in the outfield. Ervin fits the description of the modest-pop, good-speed performer whose main knock is a blocked path to playing time, but when it comes to scouting sleepers, take the skills over role every time. He'll have to force his way into the corner outfield picture due to his so-so defense, but he's a good player to stash at the back end of your team in an NL-only league, hoping he'll hit his way into the lineup.

Price point in LABR: Second-round reserve pick.

Domingo German, SP, New York Yankees

The news of the past week that both Luis Severino (shoulder) and CC Sabathia (knee, heart) will probably begin the season on the injured list has brought more attention to German, and if we were to re-do the LABR auctions of the March 2-3 weekend, I'd anticipate he'd fetch a price closer to $5 than $1. Still, German is no lock to stick in the Yankees' rotation, though he possesses enough raw ability to force the team into a difficult decision once the veterans mend come mid-April. No one was talking about his performance in his 14 starts last season, but in those, he had 26.2 percent strikeout and 15.5 percent swinging-strike rates, which ranked 33rd and 10th among 156 pitchers with at least 14 starts. German has the stuff to succeed, and he's now got the opportunity to exhibit it.

2018 Sleepers Fantasy Baseball Rookies

Price point in LABR: $1.

Pablo Lopez, SP, Miami Marlins

Top Mlb Fantasy Sleepers

Those who read my annual 'Kings of Command' column might recall Lopez as the pitcher who narrowly missed the cut due to not having faced enough major league hitters. If you lump in his Double- and Triple-A contributions before his June 30 big-league debut, however, he had a 2.75 ERA, 1.09 WHIP, 22.4 percent strikeout and 6.0 percent walk rates in 22 starts last season, numbers that give him the look of a low-risk prospect at minimum cost. Lopez is already off to a strong start this spring, including four perfect innings in his most recent outing this past Saturday, a good sign for a pitcher whose 2018 ended early due to a shoulder issue. While he has more work to do improving his curveball in order to truly break out at the big-league level, he has a good enough three-pitch array to be at least a matchups candidate in 2019.

Price point in LABR: Second-round reserve pick.

Brandon Lowe, 2B, Tampa Bay Rays

How did Lowe make the list? (Speaking of which, Lowe rhymes with how.) He possesses the combination of patience and pop that you like to see in a prospect, with a 10.8 percent walk rate and .236 isolated power between Double- and Triple-A combined in 2017-18, and a 10.8 percent walk rate and .217 isolated power in his 43 games for the Rays in the final two months of last season. Lowe's Statcast metrics backed his power potential up, as he had a 43.5 percent hard-contact rate and 10 'Barrels' on 92 balls in play, and he was an at-least-adequate fielder for the team at second base and in left and right field. The Rays could find these traits useful even in a reserve role initially, but what if Joey Wendle can't repeat his 2018 contact rate or either Kevin Kiermaier or Tommy Pham again misses time due to injury?

Price point in LABR: $1.

Tyler Mahle, SP, Cincinnati Reds

2018 Sleepers Fantasy Baseball Player Rankings

Call this one more of a hunch than a stats-driven pick, as Mahle's 10.18 ERA in his final six starts of last season, coupled with his calling a hitting-friendly environment his home, gave him the look of a 'no thank you' player for 2019. Here's what I saw: A pitcher who had a 3.83 ERA and 23.5 percent strikeout rate in his first 21 turns, during which time he registered at least 94 mph with his fastball 24 percent of the time. Mahle has been throwing hard again this spring, frequently hitting 95 mph with the pitch, with that added life giving him a better chance of at least providing matchups value to deep-mixed and NL-only teams. He's the likely No. 6 man behind a rotation that includes a trio of injury risks (Anthony DeSclafani, Sonny Gray and Alex Wood), and is well worth a stash based upon his heightened chance of making fill-in starts in 2019.

Price point in LABR: Fourth-round reserve pick.

Wade Miley, SP, Houston Astros

The Astros have made it a habit of unearthing pitching gems, and the fact that they invested in Miley, who is six games under .500 with a 4.26 ERA and 18.4 percent strikeout rate in an eight-year big league career, makes me think that they saw something exploitable in his late-2018 resurgence for the Milwaukee Brewers. During that time he went extremely cutter-heavy, throwing the pitch 45 percent of the time in 13 post-All-Star-break starts, with the result by far the best performance of his career against right-handed hitters: .240/.300/.345 triple-slash rates, the first time he had ever held them beneath a .400 slugging percentage or .300 wOBA (.288). That raised Miley's statistical floor significantly, to the point that he's a much, much safer matchups consideration for fantasy than people perceive -- perhaps even an every-start option in deep-mixed and AL-only, but probably not more since he misses so few bats. One more thing that was big for him: The move from Milwaukee's Miller Park to Houston's Minute Maid Park, while not necessarily perceived as such, represented a huge improvement for him in terms of park factors.

Price point in LABR: $4.

Matt Strahm, RP, San Diego Padres

I don't like to buy into 'best shape of my life' spring training stories, but when a pitcher like Strahm admits that he wasn't fully healthy last season and feels much more so this year, with the ability to handle the chores that come with a full-time rotation spot, I'm willing to listen. Improved confidence in his stuff alone might be enough for him to thrive in 2019, especially since he flashed four above average-performing pitches in a relief role last season and has a 3.12 FIP and 27.9 percent strikeout rate in eight career big-league starts as is. Strahm has enjoyed a lights-out start to his spring, and he's in the middle of a wide-open battle for three rotation spots with the Padres.

Price point in LABR: $2.

Christian Walker, 1B, Arizona Diamondbacks

Through seven professional seasons, the past four of which were largely played at the Triple-A level, Walker has never received an extended opportunity to prove himself, nor earned high grades on any of the prospects ranking lists. He possesses two traits that should appeal to fantasy managers, though: Scorching Triple-A stats, slashing .279/.344/.494 in his career at that level while averaging 28 home runs per 162 games played there, and a near-guarantee of being on the Diamondbacks' Opening Day roster due to his being out of minor league options. Walker suffered the misfortune of being stuck behind Chris Davis (when he was good) in Baltimore, then Paul Goldschmidt in Arizona through this stage of his career, but with Goldschmidt now traded to the St. Louis Cardinals, Walker's primary competition for at-bats in the desert are Jake Lamb and possibly Wilmer Flores. Walker should get a chance to hit his way into the everyday lineup, and he has a lot of upside for a player constantly overlooked.

Price point in LABR: $1.

Bradley Zimmer, OF, Cleveland Indians

Mlb Fantasy Baseball Sleepers 2018

Chalk this one up as potentially a 'one-year-early' pick, as deep sleepers often are, but all indications are that Zimmer is making great strides in his return from July right shoulder surgery to repair a torn labrum and has an outside chance at resuming playing in games before spring training concludes. Considering the Indians' lack of outfield depth, he could force his way into the picture sooner than later, and don't forget that he was once a more highly regarded prospect for them than any of the options they currently have out there. Zimmer does, after all, have 10 home runs and 22 stolen bases in 135 career big-league games, despite having struggled mightily making contact during that time. Even a slight improvement coupled with better luck in the health department could make him quite the bargain power/speed pick.

Fantasy Baseball Sleepers Today

Price point in LABR: $2.

Sleeper Pitchers Fantasy Baseball

Other deep sleepers to consider: Yusniel Diaz, Robbie Erlin, Jace Fry, Trevor Rosenthal, Caleb Smith, Myles Straw, Daniel Vogelbach, Luke Weaver.