👉 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

Expert Advice
Articles & Tools
Import Your Leagues
Daily Stats & Leaders
All Pitcher Matchups
Compare Any Players
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

Expert Advice
Articles & Tools
Import Your Leagues
Daily Stats & Leaders
All Pitcher Matchups
Compare Any Players
Compare Any Players
Rookies & Call-Ups
24x7 News and Alerts

REAL-TIME FANTASY NEWS

Las Vegas Raiders

Klint Kubiak Confirms he Will be Next Raiders Head Coach
Caleb Durbin

Red Sox Acquire Caleb Durbin from Brewers
Marcell Ozuna

Inks One-Year Deal With Pirates
Jonas Rondbjerg

Out for Olympics
Brad Marchand

Good to Go for Olympic Opener
Gabriel Landeskog

Healthy for Olympics
Mikey Romero

in Line for 2026 MLB Debut?
Jack Hughes

Cleared for Olympics
Ryan Clifford

to Compete for Early MLB Debut?
Max Anderson

Could Compete for Opening Day Role?
New York Yankees

Ben Hess Earns Invite to MLB Spring Training
Pittsburgh Pirates

Edward Florentino a Budding Star in Pittsburgh System?
Robert Williams III

Listed as Questionable vs. Philadelphia
George Klassen

Will Attend Big-League Spring Training
Jaylon Tyson

Could Miss First Game Since November
Scoot Henderson

Probable Monday vs. 76ers
Cedric Coward

Set to Return Monday Against Warriors
Santi Aldama

Out Again Monday Against Warriors
Ajay Mitchell

Ruled Out Against Lakers
Shaedon Sharpe

Misses Second Straight Game
Jalen Williams

Back for Thunder Monday
Brett Baty

is Getting Reps in Left Field
Jaxon Smith-Njigba

Returns to Super Bowl After Injury Scare
Sandy Alcantara

Likely to Start on Opening Day
Jaxon Smith-Njigba

Being Evaluated for Concussion, Questionable to Return
José Berríos

Jose Berrios Could Shift to the Bullpen
MJ Melendez

Mets Sign MJ Melendez to Major-League Deal
Egor Demin

Resting Against Bulls
Michael Porter Jr.

Will Miss Monday's Game
Deni Avdija

Uncertain for Monday Night
Stephen Curry

Still Out Monday
Deandre Ayton

Expected to Play Monday
Luka Dončić

Luka Doncic Ruled Out for Monday
Joel Embiid

Considered Questionable for Monday's Game
Jalen Smith

Iffy for Monday
Tre Jones

Doubtful for Monday
Josh Giddey

Likely to Remain Out Monday
Dyson Daniels

Questionable for Monday Due to Ankle Issue
Keyonte George

Won't Play Against Heat
Malik Monk

Set to Miss Another Game Monday
Jurickson Profar

May Be Undervalued After Suspension-Marred 2025
Tanner Bibee

in Line for Resurgent 2026 Season?
Ian Happ

Showing Subtle Signs of Aging Heading into 2026
Ryan Pepiot

Returning to More Favorable Home Park in 2026
Roki Sasaki

Can Roki Sasaki Rebound from Disappointing 2025 Campaign?
James Pearce Jr.

Arrested Following Police Chase
Christian Yelich

Unlikely to Replicate 2025 Campaign
Emilio Pagán

Emilio Pagan Could Regress After Career Year
Conner Capel

Rockies Sign Conner Capel to Minor-League Deal
Lou Trivino

Heading Back to Phillies
Quinn Hughes

Enters Olympics in Red-Hot Form
NHL

Juho Lammikko Returns to Switzerland
Pavel Zacha

Misses Olympics
Travis Kelce

Undecided on Playing Future, Leaning Towards Returning in 2026?
CFB

Rutgers Hiring South Dakota Head Coach Travis Johansen as Defensive Coordinator
Vinicius Oliveira

Looks For His Seventh Consecutive Win
Mario Bautista

A Favorite At UFC Vegas 113
Kyoji Horiguchi

Set For UFC Vegas 113 Co-Main Event
Amir Albazi

Looks To Bounce Back
Rizvan Kuniev

Looks For His First UFC Win
Jailton Almeida

Looks To Get Back In The Win Column
Marc-Andre Barriault

In Dire Need Of Victory
Michal Oleksiejczuk

Looks For His Third Win In A Row
Michael Penix Jr.

Says he's Ahead of Schedule After Knee Surgery
Cleveland Browns

Jim Schwartz Resigns as Browns Defensive Coordinator
Malik Nabers

Says his Rehab has Been "Phenomenal"
CFB

Oklahoma Hiring Former NFL Defensive Lineman DeShawn Williams to Analyst Role
CFB

Jahmal Edrine Charged with Sexual Assault, No Longer Enrolled at Virginia
Jakob Chychrun

Makes Big Impact in Thursday's Win
Brandon Bussi

Shuts Out Rangers With 16 Saves
Anze Kopitar

Reaches 1,300 Career Points
Mark Stone

Becomes First Vegas Player With 100 Multi-Point Games
Daniil Tarasov

Injured in Battle of Florida
Andrei Kuzmenko

Hurt Versus Vegas
John Carlson

Suffers Lower-Body Injury
Matthew Stafford

Named 2025 NFL MVP, Will Return in 2026
Jaxon Smith-Njigba

Takes Home Offensive Player of the Year Honors
Christian McCaffrey

Named Comeback Player of the Year
Tetairoa McMillan

Named Offensive Rookie of the Year
Myles Garrett

Unanimously Wins Defensive Player of the Year Award
Brad Marchand

Evan Rodrigues Among Panthers Absentees Thursday
Calum Ritchie

Rejoins Islanders Lineup as Second-Line Center
Zach Benson

Sits Out Second Straight Game
Pierre-Luc Dubois

Available Against Predators
Rickard Rakell

Out Thursday
Brayden Point

Won't Play in Olympics
Jonathan Huberdeau

to Have Season-Ending Hip Surgery
CFB

Houston, Vanderbilt, Tennessee Land Top-Three QBs in 2026 Class
Joe Mixon

Committed to Playing in 2026
CFB

Michigan Signs Top-15 Recruiting Class Despite Coaching Change
CFB

USC Finishes with No. 1 Signing Class in 2026
CFB

Trinidad Chambliss Denied Medical Redshirt Waiver By NCAA
CFB

Sam Leavitt to be Limited In Spring Practice
Jordan Love

Avoids Offseason Surgery
Matt Fitzpatrick

Back in Action at WM Phoenix Open
Sahith Theegala

Riding Hot Start Into WM Phoenix Open
J.J. Spaun

Looks to Regain Form at WM Phoenix Open
Viktor Hovland

a Volatile Option at WM Phoenix Open
Rasmus Hojgaard

Aims to Build on Solid Start to 2026
Brian Harman

Looks to Find Form at WM Phoenix Open
Daniel Berger

Has the Tools to Go One Step Higher at Scottsdale
Max Greyserman

Searching for Consistency at WM Phoenix Open
Jake Knapp

Wants Revenge at WM Phoenix Open
CFB

Joey Aguilar Granted Temporary Restraining Order Against NCAA
Joel Dahmen

Carrying Momentum Into WM Phoenix Open
Corey Conners

Unlikely to Contend at Scottsdale
Sepp Straka

Seeks a Rebound After The American Express
Jordan Spieth

Healthy Heading to WM Phoenix Open
Keith Mitchell

Building Momentum for Event in Scottsdale
Tom Hoge

The Tom Hoge Roller Coaster Heads to Scottsdale for WM Phoenix Open
Rickie Fowler

Worth a Look at WM Phoenix Open
Xander Schauffele

Making Second Appearance at Phoenix Open
Collin Morikawa

Needs a Bounce-Back at Waste Management Phoenix Open
Hideki Matsuyama

Has a Shot to Challenge at the Waste Management Phoenix Open
Max Homa

Playing Well Heading to Waste Management Phoenix Open
Ben Griffin

Will Need to Find Approach Game to Compete in Phoenix
Michael Penix Jr.

Matt Ryan Not Committing to Michael Penix Jr. as the Starting QB
RANKINGS
C
1B
2B
3B
SS
OF
SP
RP

RANKINGS

QB
RB
WR
TE
K
DEF