👉 TAP TO SAVE 30% WITH CODE NEW
X
Lost password?

Don't have an account?
Gain Access Now

X

Receive free daily analysis

NFL
NBA
NHL
NASCAR
CFB
MLB
MMA
PGA
ESPORTS
BETTING

Already have an account? Log In

X

Forgot Password


POPULAR FANTASY TOOLS

#1 Expert Projections
Save 30% Now
Import Your Leagues
Top-Rated Accuracy
Draft Simulator
Enter League Settings
Compare Any Players
Rookies & Call-Ups
24x7 News and Alerts

Prospect Debuts - Fantasy Stock Watch for Week 5

Jon Denzler reflects on fantasy baseball prospects and rookie debuts from last week, including prospect stocks that are rising and falling for fantasy owners.

Well, the Major League season is already 15% of the way done. Some owners think that they are on their way to victory while others are patiently waiting for things to turn around. Still, while all the victory laps are being taken, the smart owner is looking forward to the rest of the year and finding what value can still be had. While the season always seems to move quickly, the dog days of summer are still upon us.

Now that we are rolling along, so too are the call-ups. This week, the Rotoballer team keeps tabs on all the new names and faces, with insight into their fantasy value to help any team. For owners looking for a cheap spark, look no further.

For redraft, dynasty, or general fantasy players knowing the new prospects is key to begin to plan out FAAB bids and waiver claims. Target or avoid these players to helps teams keep their competitive windows open.

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

 

Rookie Debuts - Stock Up

These players helped their fantasy value with solid debut weeks for their respective team. If not on owners's radars, these players need to be.

 

Carter Kieboom (SS, WAS)

Only debuting at Triple-A this year, Kieboom was called up earlier than expected by the Nationals. While always listed as one of the top prospects in baseball, it is only due to the Trea Turner injury that the playing time door is open for the next month or so. Expect some swings in terms of production, but Kieboom will score runs even with a projected .240 batting average. Even more, Kieboom is a player to own for next year, but this year he will be worth the FAAB bids it took to grab him.

While not known for his power production in the minors, Kieboom does have two knocks through his first four games in the Bigs. If he can keep this up, the rest of the skills are there to turn this into a strong debut season. And yet, the jump might be just what fantasy owners need as Kieboom has always graded out with plus in-game power. His best season was 16 homers over 120 games in 2018. Expect the power to come before a consistent batting average, but either will be welcome on fantasy rosters.

The stock is up for this rookie with the early call, and owners should add Kieboom before he gets even more expensive.

 

Ty France (3B, SD)

While he has been up for a week and played in four games, France only has five total plate appearances. And yet, after a hot start to Triple-A this year, France should be slotted into a bench role, who can play first and third. While Eric Hosmer and Manny Machado are not going anywhere, with playing time spells, France will help the team not lose too much pop at the corners. Even more, with the National League needing more pinch hitters due to the pitchers alone, France, if he hangs with the team, can be the power option late in games.

In 19 games at Triple-A, France was slashing .423/.500/.885 with nine homers. Petco is admittedly not a great hitters park but does not hurt right-handed power as much as expected. With a full run, France does have 25 plus homer power potential over an entire season. The key to early season success will be keeping the K rate under 20%, as has been the case so far in his professional career. The walk rate was well down this year in the minors, but chalk that up to small sample noise. For a player that was not on most fantasy prospect lists to start the year, France is a must own on the cheap, if he keeps getting at least pinch-hitting chances.

Stock is up with the early call, and the hot start to the campaign, even with those numbers coming in the minors.

 

Stock Neutral

These players neither helped nor hurt their fantasy value in the first week of play.

 

Vladimir Guerrero Jr. (3B, TOR)

Well, Guerrero Jr. is a bust. No homers through his first three games, and a lowly .250 batting line. All joking aside, there was nothing in the first series that made owners doubt that Guerrero can make a significant impact this year. Even in his ABs that ended with a punch-out, the slugger laid off close pitches and is seeing the ball well. Even more, with the hype and pressure of the opening wee, Guerrero looked comfortable. While this might not count in the fantasy scores, it only points to a fun next few months watching more Toronto games than most owners expected.

In terms of his production in the minors, over eight games at Triple-A, Guerrero was slashing .367/.424/.700 with three homers and a steal. This is just a continuation from last year’s raking, and all signs point to an elite hitter starting his jounrey. In dynasty leagues, play him while you can, or stash him if there are contact rules. In redraft league, this writer is still a bit concerned that he will not return the third round value that it took to add him, so there might be a chance to sell high. Even if he plays like an All-Star the rest of the year, flipping him for established stars would not be the worst idea.

Stock is neutral since the hype could not even be any higher.

 

Stock Down

These players hurt their fantasy value with disappointing debuts. Not down for the count, but a red flag to keep watching.

 

Luis Rengifo (2B/SS, LAA)

A .231 batting average through his first four games should be an accurate depiction of what fantasy owners can expect this year. The batting floor will hover around .250, but the steals are what will push up his value this year. Multiple 60 steal seasons in the minors show the speed upside that Rengifo can bring. The downturn in batting average from .290 to .260 was a bit alarming when he jumped to Triple-A, so expect some bumps during his first season.

In terms of value this year, owners should be willing to stay away even with the track record of speed early in his career. Rengifo should only should only be up for a week or two until Zack Cozart is back and playing. When the Angels, as a whole, are struggling to start the year, there is a chance that owners start to see more rookie debuts in Los Angeles. Until then, sell shares high with the hype, and target Rengifo in mid-rounds next year, as this year’s Garrett Hampson.

Stock is down for now as playing time will not help fantasy owners with their ratios and rate stats.

 

Taylor Hearn (SP, TEX)

Not the debut to remember for Hearn with five runs, and four earned, over only one out. The main issue was four walks and no Ks in that inning as well. After the game, it was announced that Hearn would be shut down for three weeks due to elbow inflammation. The downside is that the Rangers are so desperate for starting pitching that Hearn would have had an excellent chance to earn some key innings this year. This means that if he does get back to the mound, expect him to be pitching out the pen to keep the wear off the elbow.

Coming into 2019, Hearn was a close to the majors arms, but who lacked the real skills to hang in the starting rotation. Many saw him as an SP4/5 or a bullpen arm. While only one appearance, the control that has plagued him continue to be his Achilles Heel. With the run factors also hurting him in Texas, Hearn is off the list the rest of the way. In dynasty leagues, this is a sell, but not right now, as the injury will kill all of his value.

Stock is down with the injury, and the less than stellar debut.

More MLB Prospects Analysis




POPULAR FANTASY TOOLS

#1 Expert Projections
Save 30% Now
Import Your Leagues
Top-Rated Accuracy
Draft Simulator
Enter League Settings
Compare Any Players
Rookies & Call-Ups
24x7 News and Alerts

REAL-TIME FANTASY NEWS

Justin Jefferson

Poised to Re-Emerge as an Elite Dynasty Wide Receiver in 2026
J.J. McCarthy

Dynasty Value is Fading Heading into 2026
NFL

Brenen Thompson May Struggle to Consistently Earn Targets in the NFL
Drake Maye

Can Drake Maye Overcome Questionable Supporting Cast in New England?
Garrett Wilson

Will Garrett Wilson Have a More Stable Environment Around Him in New York Going Forward?
NFL

Omar Cooper Jr.'s Stock is Rising as Draft Day Approaches
J.J. Spaun

Needs the Putter to Cooperate in San Antonio
Thorbjorn Olesen

Trending Up in San Antonio
Denny McCarthy

Carrying Momentum into San Antonio
Matt Grzelcyk

Unavailable for Reminder of Season
Artyom Levshunov

Ruled Out for Rest of Season
Mathieu Olivier

to Miss Couple of Weeks
Evan Rodrigues

to Have Season-Ending Surgery
Sam Reinhart

Won't Return This Season
Carter Yakemchuk

Injured in Tuesday's Loss
Aaron Ekblad

Hand Injury "Doesn't Look Good"
Cameron Johnson

Available Against Jazz
Aaron Gordon

Likely to Play Wednesday Night
Malik Monk

Suiting Up Wednesday
DeMar DeRozan

Cleared to Face Raptors
Andrew Wiggins

Questionable Against Celtics
Norman Powell

Won't Play Wednesday
Danny Wolf

Without Timeline for Return
Jose Fernandez

Launches Two Home Runs in Historic MLB Debut
Chase DeLauter

Exits Tuesday's Game with Foot Injury, X-Rays Come Back Negative
Odell Beckham Jr.

Meets with John Harbaugh About Giants Reunion
Chris Kirk

Has Course History on His Side in San Antonio
Billy Horschel

a Volatile Option at the Valero Texas Open
Joe Highsmith

Still Searching for Form in San Antonio
Christiaan Bezuidenhout

Looks to Find Form at the Valero Texas Open
Dalton Kincaid

Load Management a Possibility for Dalton Kincaid
J.K. Dobbins

is Fully Healthy for 2026
Jauan Jennings

49ers Acknowledge Jauan Jennings Won't Return
LeBron James

Set to Play in Cleveland Matchup
Jayson Tatum

Cleared to Play Wednesday
Neemias Queta

Returns Against Miami
De'Anthony Melton

Ruled Out Against Spurs
Kristaps Porzingis

Ruled Out Wednesday
Pascal Siakam

Expected to Suit Up Wednesday
Andrew Nembhard

Sitting Out Wednesday
Olivier-Maxence Prosper

Off Injury Report Wednesday
Ty Jerome

to Miss Fifth Straight Game
Caris LeVert

Available Tuesday Against Raptors
Miles McBride

to Suit up on Tuesday
Collin Murray-Boyles

Cleared to Play Tuesday
Marcus Sasser

is Available on Tuesday
Brandon Ingram

Returns Vs. Detroit
Seiya Suzuki

to Begin a Rehab Assignment Soon
Simon Holmstrom

Misses Tuesday's Action
Alexandre Carrier

Out 2-4 Weeks With Upper-Body Injury
Jordan Spieth

a Horse for Course History at TPC San Antonio
Mason Lohrei

Misses Second Consecutive Game Tuesday
Tyler Myers

Unavailable Against Bruins
Robert MacIntyre

Has One Flaw to Overcome at Valero Texas Open to be a Must-Play
Michael Bunting

to Sit Out Tuesday's Game
Maverick McNealy

In Exceptional Form This Season
Michael Thorbjornsen

Playing Well But Still Searching For A Win
Hideki Matsuyama

Playing Well Heading to the Valero Texas Open
Si Woo Kim

Heads to Valero Texas Open For Final Tune-Up Before Masters
Nikita Kucherov

a Game-Time Decision Tuesday
Evgeni Malkin

Ready for Action Tuesday
Sam Bennett

Rejoins Panthers Lineup Tuesday
Cody Ponce

Diagnosed With ACL Sprain, to Miss "Significant Time"
Tank Dell

Uncertain for OTAs, But Expected to Play in 2026
Alvin Kamara

Saints Still Want to Address Alvin Kamara's Contract
George Pickens

Cowboys Have "Long-Term Plans" for George Pickens
Kyle Pitts Sr.

Falcons Not Ruling Out Potential Kyle Pitts Sr. Trade
Jordan James

the "Front-Runner" to be Top Backup RB
A.J. Brown

Patriots Still Not Ruling Out an A.J. Brown Trade
Aaron Rodgers

Planning to Re-Sign With Steelers?
Seattle Seahawks

Mike Washington Jr. Would Fill a Big Need for Seahawks
Los Angeles Rams

Kenyon Sadiq a Good Fit With the Rams?
Green Bay Packers

Packers to "Strip Everything Down" on Offense
Anthony Richardson Sr.

to Stay With Colts?
Collin Morikawa

Withdraws From Valero Texas Open
PGA

Stephan Jaegar Still Looking For Consistency at Valero Texas Open
Nicolai Hojgaard

is Red-Hot Coming to TPC San Antonio
Tony Finau

a Risky Proposition at Valero Texas Open
Ludvig Aberg

Looks to Shake Off Collapse at Valero Texas Open
Jacob deGrom

Cleared for Season Debut on Tuesday
Colt Emerson

Signs an Eight-Year Extension with Mariners
William Nylander

Records Four Points Against Ducks
Macklin Celebrini

Becomes Sixth Teenager With 100-Point Season
Jaden Schwartz

Could Return Tuesday
Jordan Greenway

Available Tuesday
Jake Sanderson

Remains Out Tuesday
Cutter Gauthier

Exits Early Against Maple Leafs
Patrick Rodgers

Needs to Make More Birdies in San Antonio
Sepp Straka

Seeks Opportunity in San Antonio This Weekend
Nick Taylor

Could Again Struggle at the Valero Texas Open
Jose Altuve

Tallies Four Hits, Two Homers in Big Night
Miguel Vargas

Hits Grand Slam, Drives in Six in Win Over Miami
Tanner Bibee

to Start on Tuesday Against Dodgers
Chase Elliott

Takes Advantage of Pit Strategies for Second Career Martinsville Win
Denny Hamlin

Dominates but Finishes Second at Martinsville
Joey Logano

Bounces Back with Third-Place Finish at Martinsville
Ty Gibbs

Gains his Fourth Top-Five Finish of the Season at Martinsville
William Byron

Scores Another Top-Five Finish at Martinsville
Joe Pyfer

Extends His Winning Streak
Israel Adesanya

Loses Fourth Consecutive Fight
Maycee Barber

Suffers Her First Knockout Loss
Alexa Grasso

Scores Highlight-Reel Knockout
Niko Price

Retires After UFC Seattle Loss
Michael Chiesa

Victorious In His Retirement Fight
Julian Erosa

Suffers First-Round Knockout Loss
Lerryan Douglas

Scores First-Round Knockout Win In His UFC Debut
Alex Bregman

Clobbers First Two Homers in Sunday's Loss at Wrigley
Yandy Díaz

Yandy Diaz Records Five Hits, Drives in Four in Win Over Cardinals
Kyle Larson

Is Likely to Pay Off for DFS at Martinsville
Christopher Bell

Could Have Another Top-10 Performance At Martinsville
William Byron

Is A Threat to Win Again at Martinsville
Chase Elliott

is A Solid DFS Option for Martinsville Lineups
Chase Briscoe

has Plenty of Upside for DFS Lineups at Martinsville
Carlos Estévez

Carlos Estevez Unlikely to See High-Leverage Opportunities in Near Future
Jacob deGrom

Feels "Much Better," Hopeful he Can Start This Week
Ty Gibbs

Should Fantasy Managers Roster Ty Gibbs at Martinsville?
Ryan Preece

Is A Solid DFS Option for Martinsville Lineups
Josh Berry

Could Josh Berry Pay Off for Tournament DFS Lineups At Martinsville?
Carson Hocevar

May be Too Inconsistent to Start in Martinsville DFS Lineups
Austin Cindric

Is Austin Cindric Worth Rostering for DFS At Martinsville?
Denny Hamlin

the Favorite to Win at Martinsville
Ryan Blaney

Should Contend at Martinsville
Tyler Reddick

Should Come Back Down to Earth at Martinsville
Joey Logano

Will Be Strong at Martinsville
NASCAR

Bubba Wallace Looking to Rebound at Martinsville
Shane Van Gisbergen

Shane van Gisbergen Showing Progress, Qualifies Fifth at Martinsville
Dylan Cease

Fans 12 in Blue Jays Debut on Saturday
Andrew Vaughn

Needs Hand Surgery, Expected to be Out 4-6 Weeks
Jacob deGrom

"Confident" he Will Make his Next Start
Jacob deGrom

Scratched From Saturday's Start Due to Neck Stiffness
Jeferson Quero

Brewers Calling Up Catching Prospect Jeferson Quero
Deyvison De Los Santos

Marlins Promote Deyvison De Los Santos to Major Leagues
Shea Langeliers

Hits Two Home Runs on Opening Day
Kevin Gausman

Picks Up No-Decision But Strikes Out 11 on Opening Day
Joe Pyfer

Set For UFC Seattle Main Event
Israel Adesanya

Returns At UFC Seattle
Maycee Barber

Looks To Extend Her Win Streak To Eight
Alexa Grasso

Looks To Get Back In The Win Column
Niko Price

In Dire Need Of Victory
Michael Chiesa

Set For Retirement Fight
Lerryan Douglas

Set For His UFC Debut
Julian Erosa

Looks To Bounce Back
RANKINGS
C
1B
2B
3B
SS
OF
SP
RP

RANKINGS

QB
RB
WR
TE
K
DEF