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Rookie Report: Prospect Risers and Fallers for Week 12

fantasy baseball prospects MLB prospects rookies call-ups

Fantasy baseball prospects recently called up, and their rest of season projections. Phil Goyette evaluates rising and falling fantasy baseball rookies for Week 12.

Welcome to the latest edition of RotoBaller’s Recently Promoted Prospects series for fantasy baseball! Here I discuss some recently promoted MLB prospects and rookies , making note of what I think their upside could be for fantasy baseball managers, and whether they are potential risers or fallers.

We have seen 125 rookies make their MLB debut in 2021. This week I'll look at three rookie pitchers that might work their way into fantasy relevance in 2021. I will use video looks, scouting reports, analytics, and RotoBaller’s premium projections to predict what each recently called-up player could do if given a continued opportunity in 2021.

Here are your recently promoted prospects for Week 12 of the fantasy baseball season.

Be sure to check all of our fantasy baseball lineup tools and resources:

 

Matt Manning, Detroit Tigers

17% Rostered on Yahoo

Situation: By calling up Matt Manning to make his major league debut this week, the Detroit Tigers now have three promising young hurlers in the rotation. With Matthew Boyd, Julio Teheran, and Spencer Turnbull on the IL, the Tigers are looking to the future giving Casey Mize, Tarik Skubal, and Matt Manning turns at the top of the rotation.

Skill: Manning is an athletic righty who gets excellent extension (7.0 feet) on his delivery, allowing his four-seam fastball to play a couple of ticks faster than it's 94 mph average velocity. He mixes in a slider, changeup, and curveball as secondary offerings, but none of them stand out as a MLB out-pitch at the moment. He figures to be fastball heavy early on, but it is a pitch that Manning can rely on if he's able to hit his spots with it.

Projection: Manning has been a highly touted prospect for some time now, so I think he projects to be a future bona-fide fantasy SP2 or 3 in the future. For redraft in 2021, I think it will take some time for Manning to get his legs under him. The good news is that, unlike some other rookie hurlers that we've seen debut in 2021, Manning's fastball should allow him to avoid getting barreled to death while he works on establishing his secondaries. I'll take the under on Steamer's 4.73 ERA projection, maybe even by a half run. Figure 75 innings of 4.25 ERA and a WHIP around 1.30 for 2021.

 

Kyle Muller, Atlanta Braves

0% Rostered on Yahoo

Situation: With the Braves in need of pitching depth this week, Kyle Muller was briefly brought up to make his MLB debut before getting shuttled back down to Triple-A. He pitched 1-inning of relief in his debut. He's likely going to be brought back up to make his first start in one of the Braves' doubleheader games this Monday.

Skill: While he got his first MLB look out of the bullpen, Muller is a lefty with the potential to contribute in the Braves rotation in the near future. He was a second-round choice out of the Texas prep ranks in 2016. Muller has posted strong strikeout rates during his minor league career, but has struggled with his control since 2018. If he can harness the control, he has the stuff to work as a MLB starter. His fastball comes in two varieties (four-seam and sinker) and he sits comfortably around 95 mph with the heater. He backs the fastballs up with a hard slider that could be a pitch he features more than the heater at times. It has good horizontal run and should generate a fair share of whiffs. Then he mixes in a slower curveball that still features some two plane break that can generate whiffs as well.

Projection: If Muller gets the nod as the 5th rotation option for Atlanta, he's definitely worth an add in deeper formats and he's a streamer play in shallow ones. Muller's stuff is good enough that it should generate strikeouts at the MLB level. There's still work to be done in the command and control department, so expect some bumps mixed in with the occasional gem from this young lefty.

 

Tony Santillan, Cincinnati Reds

10% Rostered on Yahoo

Situation: With Sonny Gray and Tejay Antone going down with injury over the last two weeks, the Reds have turned to Tony Santillan to plug the hole in their starting rotation. Santiallan, 24, was the Reds' 2nd round choice in the 2015 draft.

Skill: Santillan has been a steady starting pitcher in the Reds' organization throughout his minor league career. He's really a two-pitch pitcher, relying on a four-seam fastball that touches 95 mph and a tight harder curveball that runs about 10 mph under the fastball. He mixes in a changeup at times but hasn't shown a great feel for the pitch yet this season. The fastball should have enough rise and carry to play up in the zone and generate some whiffs.

Projection: Publicly available projection systems have Santillan around a 5.00 ERA for the remainder of the 2021 season. I tend to share their pessimism, as it's hard for me to see him getting by against MLB hitting on two pitches that are likely above-average at best. In the event that his changeup can come along, there's maybe more hope for Santillan as a streamer in nice matchups moving forward this season.



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POPULAR FANTASY TOOLS

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REAL-TIME FANTASY NEWS

Cade Cunningham

is Questionable Tuesday in Atlanta
Jaylen Warren

Mike Tomlin Optimistic About Jaylen Warren's Availability for Week 12
C.J. Stroud

Not Expected to Play on Thursday Night
Aaron Rodgers

Won't Need Surgery on Fractured Wrist, Could Play in Week 12?
Davis Mills

Prepping for Third Straight Start in Week 12?
CFB

Sam Leavitt Set to Enter Transfer Portal?
Mason Rudolph

Could Make His First Start of 2025 in Week 12
Brock Wright

Sets Career-High in Targets; Lined Up for More Work?
Stephon Castle

Out Against Grizzlies
Kimani Vidal

Struggles Again and Faces Role Uncertainty After Bye
Dak Prescott

in Full Command Monday Night With Four Touchdown Passes
Quentin Johnston

Posts Zero Catches During Offensive Collapse
George Pickens

Erupts for 144 Yards, Touchdown in Monday Night Win
Jrue Holiday

Unlikely to Play Tuesday
CeeDee Lamb

George Pickens Benched for First Drive
LeBron James

Officially Listed as Questionable for Tuesday
Jose Altuve

Undergoes Foot Surgery
Giannis Antetokounmpo

Exits Monday's Game With Groin Injury
Julian Strawther

Out on Monday
Cameron Johnson

Cleared for Action Monday
Nikola Jokić

Nikola Jokic Available Against Bulls
Zaccharie Risacher

Considered Questionable for Tuesday's Game
Onyeka Okongwu

Iffy for Tuesday
Kristaps Porzingis

May Miss Another Game Tuesday
Jalen Suggs

Listed as Questionable for Tuesday
Paolo Banchero

to Remain Out Tuesday
Ayo Dosunmu

Playing on Minutes Restriction Monday
Tre Jones

Still Out Monday
Saddiq Bey

Won't Play Against OKC
Zion Williamson

Still Out on Monday Night
Jamison Battle

Available Monday
Ochai Agbaji

Remains Out Monday
Alex Singleton

Broncos Optimistic Patrick Surtain, Alex Singleton Will Return After the Bye
Trey Hendrickson

Doubtful Again in Week 12
Ausar Thompson

Misses Fourth Straight Game
Jalen Duren

Returns Against Pacers
Shedeur Sanders

Expected to Make First Career Start in Week 12
Josh Jacobs

Dealing With Knee Contusion
Mikael Granlund

Unavailable Monday
Alex Bregman

Red Sox Going for Either Alex Bregman or Pete Alonso?
Conor Garland

Misses Monday's Game
Eetu Luostarinen

Out on Monday
Drake London

Considered "Week-to-Week"
Drew Doughty

Listed as Week-to-Week
Ja'Marr Chase

Being Suspended for One Game for Unsportsmanlike Conduct
John Carlson

a Game-Time Call Monday
Viktor Arvidsson

Out Week-to-Week
Charlie McAvoy

Out Against Hurricanes
CFB

James Franklin to be Virginia Tech's Next Head Coach
Brandon Aiyuk

49ers Won't Open Brandon Aiyuk's Practice Window This Week
Joe Burrow

Could Do 11-on-11 Work This Week in Practice
Michael Penix Jr.

Heads to Injured Reserve, Could Need Full Knee Reconstruction
Tyrod Taylor

Taking Over as Jets' Starting QB
CFB

Fernando Mendoza the Clear Heisman Trophy Favorite?
CFB

Beau Pribula Has Chance to Face Oklahoma on Saturday
Mitchell Marner

Establishes Vegas Record Sunday
Mats Zuccarello

Logs Two Assists in Overtime Victory
Lucas Raymond

Leads Red Wings to Victory at MSG
Quinn Hughes

Delivers Four Assists in Sunday's Win
Conor Garland

Limited to Handful of Minutes Sunday
Ryan Hartman

Suffers Lower-Body Injury
Adrian Kempe

Agrees to $85 Million Extension With Kings
Jack Della Maddalena

Gets Dominated
Islam Makhachev

Claims UFC Welterweight Belt
Zhang Weili

Gets Outclassed
Valentina Shevchenko

Wins Unanimous Decision At UFC 322
Sean Brady

Suffers First-Round TKO Loss
Michael Morales

Remains Unbeaten
Leon Edwards

Suffers Second-Round Knockout Loss
Leon Edwards

Carlos Prates Becomes The First Man To Knock Out Leon Edwards
Beneil Dariush

Suffers Brutal First-Round Knockout Loss
Beneil Dariush

Benoit Saint Denis Knocks Out Beneil Dariush In 16 Seconds
Josh Naylor

Mariners Finalizing Five-Year Contract
Scott Mayfield

Available Sunday
NYI

Max Shabanov Returns From 12-Game Absence Sunday
Samuel Honzek

Out Week-to-Week
Kirby Dach

Sidelined for 4-6 Weeks
Thatcher Demko

Considered Week-to-Week
Filip Hronek

Good to Go Sunday
Quinn Hughes

Back in Action Sunday
CFB

Jeremiah Smith, Carnell Tate Not Dealing With Long-Term Injuries
CFB

Virginia Tech Close To Naming James Franklin As Head Coach
CFB

Garrett Nussmeier Doubtful vs. Arkansas On Saturday
Edwin Díaz

Blue Jays Interested in Signing Edwin Diaz?
Jacob deGrom

Named AL Comeback Player of the Year
Ronald Acuña Jr.

Ronald Acuna Jr. Wins NL Comeback Player of the Year Award
Aroldis Chapman

Named AL Reliever of the Year
Edwin Díaz

Edwin Diaz Named NL Reliever of the Year
Justin Thomas

Will Miss Start Of 2026 After Undergoing Back Surgery
Islam Makhachev

Set For UFC 322 Main Event
Jack Della Maddalena

Set For His First Title Defense
Zhang Weili

Can Become The New Women's Flyweight Champion
Valentina Shevchenko

Set For UFC 322 Co-Main Event
Michael Morales

Looks To Remain Undefeated
CFB

Mario Craver a Game-Time Decision for Week 12
Sean Brady

Set For Title Eliminator Bout
Carlos Prates

A Favorite At UFC 322
Leon Edwards

Looks To Get Back In The Win Column
Benoît Saint Denis

Benoit Saint Denis Set To Open Up UFC 322 Main Card
Beneil Dariush

Looks To Win Back-To-Back Fights
CFB

Virginia's Chandler Morris Trending Toward Facing Duke on Saturday
Edwin Díaz

Edwin Diaz Says There's a "50-50" Chance he Returns to Mets
Shohei Ohtani

Wins his Fourth MVP Award
Aaron Judge

Wins AL MVP Award Again
Raisel Iglesias

Dodgers Interested in Signing Raisel Iglesias
Pete Alonso

Orioles Could be in the Mix to Sign Pete Alonso
Félix Bautista

Felix Bautista Could Return in Second Half in 2026
Kodai Senga

Attracting Trade Interest, Will the Mets Move him?
Yordan Alvarez

Expected to be Ready for Spring Training
Byron Buxton

Could Waive his No-Trade Clause
Paul Skenes

the Unanimous NL Cy Young Winner
Tarik Skubal

Wins AL Cy Young for Second Straight Year

RANKINGS

QB
RB
WR
TE
K
DEF
RANKINGS
C
1B
2B
3B
SS
OF
SP
RP