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Fantasy Baseball Rookie Risers/Fallers (Week 20)

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 47% 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.

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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.

Dom Nunez (C, COL)

With the sudden release of Chris Iannetta, the Rockies are clearly forcing the issue with Nunez. While Tony Wolters is still able to provide a plus glove with some athleticism behind the plate, Nunez is the better hitter of the two. Only one game so far up in the bigs, but the team context makes him worthy of a review this week. With the Rockies out of the race, look for Bud Black to try out his catcher of the future. In his first game, Nunez had only one hit, but when that hit is a homer, owners can breathe easier. With 71 homers in 521 career minor league games, the power is there is factor in for fantasy value. 

The main reason the stock is up with this backstop is the improving defense behind the dish. Questions earlier in his career focused on the big frame, and while able to block balls in the dirt with the best of them, Nunez had a hard time being accurate on the throw to second. Still, the arm is a plus tool, and he has improved his caught stealing numbers with every step up the ladder. While there is still some development left, as of now, Nunez is a starting option in NL-only leagues from the start.

 

Josh Rojas (3B, ARI)

A former 26th-round draft selection by the Houston Astros, Rojas was dealt to Arizona in the Zach Greinke deal. Entering most formats with only third base eligibility, owners should expect to see Rojas play at second and short as well. Projecting as a utility fielder, Rojas flashes the glove to make him a playable asset on most teams. Even more, over his first four games, Rojas collected four hits and scored two runs. He was caught stealing on his only attempt, but the speed will be there if he can keep getting on base. For comparison, in 291 career minor league games, Rojas swiped 71 bases. 

Rojas has been one of the better minor-league bats, and still seemingly was a complementary piece in the trade. Nevertheless, in his first eight games at Reno, Rojas slashed .514/.575/.943. While only a week of play, he had been batting .310 with Round Rock prior to the move as well. For fantasy owners, Rojas is a player with playing time potential on a team looking to find a starter at second for next year. The fact that he has been mashing this year should only make it easier to add him. 

 

Randy Dobnak (RP, MIN)

Entering the game for his debut after Devin Smeltzer allowed six runs in 4.1 innings, Dobnak was thrown right into the fire versus Cleveland. And yet, with four scoreless innings against one of the hottest offenses in the game, the stock could only be moving up. While he was demoted after the game due to the extended outing, Dobnak could be a vital arm on a team in need of bullpen help. At the very least he will be back up soon. While the Twins went and added some pieces at the deadline, with Sam Dyson already on the Injured List, they are back to where they started. Hence, the increased usage that Dobnak can expect to see. 

While he has four pitches, Dobnak used fastballs and sinkers on 67% of his offerings against Cleveland. Both register at 91 on the radar and might be a bit risky without much separation. Add in the launching pad that is Target Field, and Donbak will need to go to his changeup to have sustained success. And yet, Dobnak did post a 23% Whiff rate with his pitches. While part of this has to be down to the new team seeing a new arm, the stuff was there in the minors as well. With a career 1.10 WHIP to show the command, and a 2.70 ERA for the run suppression, the track record is there. Long relief seems to be his role for now, but with another injury or two, expect Dobnak to be a follower yet this year. 

 

Rookie Debuts - Stock Down

These players hurt their fantasy value during their first week of play.

Chandler Shepherd (SP/RP, BAL)

A 13th-round selection by the Boston Red Sox back in 2014, Shepherd was claimed off waivers via the Cubs last year, This came after only a week with the team, as he had been waived by the Sox a week earlier. Mixing in four pitches, Shepherd tops out at 93 on the fastball but has decent control with all of his offerings. The fastball is the best pitch and while the velocity might be an issue in the bigs the curveball and cutter offer excellent alternatives. Shepherd will be a pitcher who pounds the zone but has been active at generating ground ball outs at each step up the ladder.

To start his career, Shepherd projects as a reliever. This explains why the Sox and Cub moved on so quickly, and why with Baltimore needing to fill inning, there is a real shot for continued work. Still, in his first four innings against the Yankees, he only allowed one earned run and struck out two. The concern will be the walks, as he dished out three free passes over his first outing. For now, the limit is the team around him, and with a lack of wins, there is not much of value here. For owners in leagues that count innings, Shepherd might be a good stash. And yet, the WHIP numbers will be high for that role owners are better suited to pass on this low-ceiling arm.

More MLB Prospects Analysis




REAL-TIME FANTASY NEWS

Pat Bryant

Working With Training Staff This Offseason
Jacoby Brissett

in Communication With Cardinals Despite Skipping Workouts
Daniel Jones

Could Take Part in 7-on-7 Drills at OTAs
Tyler Glasnow

Dodgers Put Tyler Glasnow on Injured List With Back Spasms
Sam Merrill

Iffy for Game 3 on Saturday
Anthony Edwards

Rejoins Starting Lineup Friday
Kevin Huerter

Likely to Remain Out Saturday
Jarred Vanderbilt

Considered Questionable for Saturday
Jalen Williams

Ruled Out for Game 3 Against Lakers
Ayo Dosunmu

Cleared to Play Friday
Anthony Edwards

Available Friday Night
Joel Embiid

is Returning for Game 3 on Friday
Brandon Ingram

Undergoes Heel Surgery
Josh Hart

is Available to Play in Game 3
OG Anunoby

is Downgraded to Out for Game 3 on Friday
Mitchell Robinson

is Returning for Game 3
Mats Zuccarello

Expected to Play Saturday
Joel Eriksson Ek

to Be a Game-Time Decision Saturday
Jonas Brodin

Still Out Saturday
Josh Manson

Could Return Saturday
Kaedan Korczak

Scratched for Game 3 Against Ducks
Radko Gudas

Likely to Remain Out Friday
Sam Carrick

Won't Play Friday
Isiah Pacheco

Can Isiah Pacheco Re-Establish His Dynasty Value in Detroit?
Rico Dowdle

Dynasty Ceiling Limited By Backfield Committee in Pittsburgh
Rashid Shaheed

a High-Risk, High-Reward Buy-Low Candidate for Dynasty Managers
Marcus Mariota

Is Marcus Mariota Worth Stashing as an Injury Replacement in Dynasty Leagues?
Jacoby Brissett

a Clear Sell-High Candidate for Dynasty Managers
Blake Snell

to Make Season Debut for Dodgers on Saturday
Najee Harris

Can Najee Harris Re-Establish Some Dynasty Value in 2026?
Cole Ragans

Royals Place Cole Ragans on Injured List With Elbow Impingement
Breece Hall

Jets Sign Breece Hall to Three-Year Extension Worth $45.75 Million
Sean Strickland

An Underdog At UFC 328
Khamzat Chimaev

Set For UFC 328 Main Event
Tatsuro Taira

Can Become The New Flyweight Champion
Joshua Van

Set For His First Title Defense
Alexander Volkov

Looks To Win Back-To-Back Fights
MMA

Waldo Cortes-Acosta Looks To Extend His Win Streak
Nick Lodolo

Officially Activated, Making Season Debut on Friday
Denver Broncos

Broncos Sign GM George Paton to New Five-Year Deal
Brandon McManus

Packers Release Kicker Brandon McManus
New York Jets

Jets Talking to a "Number of Veteran Quarterbacks"
Travis Etienne Jr.

a Reliable Dynasty Starter Entering First Season With Saints
Kenneth Gainwell

Is Kenneth Gainwell's Dynasty Stock Still Rising After Offseason Change of Scenery?
Mac Jones

a Deep-League Dynasty Stash Candidate
Tez Johnson

Facing Uphill Battle for Playing Time in Tampa Bay
Jared Goff

Remains a High-Floor Dynasty QB2 Heading into 2026
De'Von Achane

Remains a High-End Dynasty RB Despite Uncertain Supporting Cast
Xavier Worthy

Chiefs Limited Xavier Worthy's Usage After Injury Last Year
Rashee Rice

Chiefs Not Ready to Discuss Extension With Rashee Rice?
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Walker Lyons Could be Go-To Target for Bear Bachmeier
Austin Reaves

Scores 31 Points in Game 2 Defeat
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Ty Benefield a Potential Game-Changer for LSU Defense
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Anchors Thunder Past Lakers in Game 2
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Hayden Lowe Set for Significant Role Following Miami's NFL Departures
Tobias Harris

Stays Hot in Game 2 Victory
Cade Cunningham

Pushes Pistons to 2-0 Series Lead
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Taylor Wein in Position for Big Season on Oklahoma's Defensive Line
Jarrett Allen

Provides Bright Spot in Cavs' Game 2 Loss to Pistons
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Rasheem Biles an Instant Impact Player for Texas
James Harden

Struggles in Game 2 Loss
Donovan Mitchell

Finishes Game 2 Loss with 31 Points
Gradey Dick

Open to Trade Away From Toronto
Michael Porter Jr.

Wants to Stay in Brooklyn
Dan Vladar

Looks to Return to Winning Ways Thursday
Connor Dewar

Penguins Re-Sign Connor Dewar for Two Years
Mikko Rantanen

Played Through Torn MCL Late in the Season
Rasmus Dahlin

Ready to Go Friday
Alexander Nikishin

Set to Return Thursday
Christian Dvorak

Available Thursday
Owen Tippett

Remains Out Thursday
Roman Anthony

Heading for the Injured List
CFB

Sam Leavitt Expected to Be Full-Go for Fall Camp
Tarik Skubal

Could Return in 4-6 Weeks After Successful Elbow Surgery
Cole Ragans

Royals Hopeful That Cole Ragans Makes his Next Start
Mark Stone

Nets Late Power-Play Goal in Losing Effort
Leo Carlsson

Pots Game-Winner Wednesday Night
Juraj Slafkovsky

Ends Point Drought in Game 1 Loss
Bowen Byram

Ties Franchise Record With Fourth Postseason Goal
Zach Benson

Posts Second Consecutive Multi-Point Game
Rasmus Dahlin

"Seems Fine" After Early Exit on Wednesday
Emilio Pagán

Emilio Pagan has Grade 2 Hamstring Strain, Expected to Miss 4-8 Weeks
Joe Ryan

Listed as Scheduled Starter for Saturday Against Cleveland
Tyler Glasnow

Not Expected to Land on the Injured List
Framber Valdez

Suspension Reduced to Five Games
Nils Hoglander

Will Miss World Championship Due to Injury
Framber Valdez

Suspended Six Games
Tyler Glasnow

Exits Early on Wednesday With Back Pain
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Brauntae Johnson the Next Star in Notre Dame's Secondary?
CFB

Ethan Barbour a Name to Know in Georgia's Tight End Room
CFB

Payton Pierce Next Up at Linebacker for Ohio State
CFB

Javin Gordon to Play Significant Role for Tennessee?
CFB

Tanook Hines Stepping into WR1 Role for USC
CFB

Rueben Owens II has "Star Potential" in Fourth Campaign
Brandon Woodruff

has Fluid Drained From his Right Shoulder
Brandon Woodruff

to Resume Throwing on Saturday, Return Imminent?
Carlos Correa

to Have Season-Ending Ankle Surgery
Jacob Misiorowski

Listed as Friday's Probable Starter
Logan Webb

Dealing With Knee Discomfort
Carlos Correa

Expected to Miss Significant Time With Ankle Injury
Collin Morikawa

Withdraws From Truist Championship
Xander Schauffele

Carries Elite Form Into Quail Hollow
Hideki Matsuyama

Looks to Bounce Back at Truist Championship
Matt Fitzpatrick

Secures Third Win of 2026 Season
Patrick Cantlay

Continues Playing Well Heading to Truist Championship
Ludvig Aberg

Returns to Action For Truist Championship
Justin Thomas

Searching for Consistency at Quail Hollow
Jordan Spieth

Looks to Break Through at Quail Hollow
Adam Scott

Brings Strong Form to Quail Hollow
Robert MacIntyre

a Steady Option at Truist Championship
Jason Day

Looks to Overcome Approach Struggles at Quail Hollow
Akshay Bhatia

Looks for Complete Game at Truist Championship
Emilio Pagán

Emilio Pagan Headed for Injured List With Hamstring Injury
Emilio Pagán

Emilio Pagan Carted Off With Apparent Hamstring Injury on Tuesday
Justin Rose

to Continue Mid-Season Club Change at Truist Championship
Si Woo Kim

is Back to Peak Form Ahead of Truist Championship
Sam Burns

to Bounce Back at Truist Championship
Cameron Young

Looks to Carry Dominance to Quail Hollow
Rory McIlroy

Returns to Familiar Stomping Grounds This Week at Quail Hollow
Chris Gotterup

Looking to Bounce Back at Quail Hollow
Tommy Fleetwood

Looking For Better Iron Play at Quail Hollow
CFB

Mario Craver Enters No. 1 Wide Receiver Role for Marcel Reed
CFB

LaNorris Sellers a Strong Rebound Candidate in 2026
CFB

Cam Coleman Poised for Monster Year at Texas?
CFB

Will Hammond Pushing to Be Ready for Week 1
Alex Fitzpatrick

Looking to Keep Up Ball-Striking Output at Quail Hollow
CFB

Notre Dame Leads College Football in Returning Snaps
CFB

Two Ole Miss Football Players Arrested, Charged with DUI
Ben Griffin

Looks Solid on the Surface Heading to Charlotte
Chase Elliott

Earns his Second Texas Motor Speedway Victory
Denny Hamlin

Misses Out on Winning at Texas
Alex Bowman

Finishes Third for the Second Week in a Row at Texas
Tyler Reddick

Earns Seventh Top-Five Finish of the Season at Texas
Chris Buescher

Scores his First Career Texas Finish in the Top Five
CFB

Bryce Underwood in Better Situation Entering Sophomore Season
CFB

Nico Iamaleava Emerging as Leader, Playmaker for UCLA
Jack Della Maddalena

Gets Dominated At UFC Perth
Carlos Prates

Shines At UFC Perth
Beneil Dariush

Suffers A First-Round TKO Loss
Quillan Salkilld

Remains Unbeaten In The UFC
Tim Elliott

Drops Decision At UFC Perth
Steve Erceg

Wins Back-To-Back Fights
Ollie Schmid

Suffers First-Round TKO Loss
Marwan Rahiki

Remains Unbeaten
Christopher Bell

Is Christopher Bell Worth Rostering for Texas Lineups?
William Byron

Might have the Speed to Compete for the Win at Texas
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Provides Solid Upside for Texas DFS Lineups
Chase Briscoe

Could Chase Briscoe be A Sneaky Pick for Texas Lineups?
Ty Gibbs

Should DFS Managers Roster Ty Gibbs at Texas?
Daniel Suarez

Is Daniel Suarez Worth Rostering After Career-Best Starting Position at Texas?
Kyle Busch

Is a DFS Risk Starting in the Top 10 at Texas
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One of the Favorites to Win at Texas
Chase Elliott

Could Contend for Another Win at Texas
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on Pole at Texas
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Bubba Wallace Wrecks in Practice at Texas
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Looking to Continue Strong Run at Texas
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Blows Engine in Practice at Texas
RANKINGS
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1B
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SP
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