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Fantasy Baseball Rookie Risers/Fallers (Week 6)

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 18% 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 lineup 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.

 

Josh VanMeter (2B, CIN)

While not a top prospect in his own right, VanMeter does have an exciting mix of defense and hit tool to keep him in the conversation. After struggling a bit after ending the year at Triple-A, Vanmeter has been back with force this year. Over 30 games he was slashing .336/.431/.736 with 13 homers and five steals. While known as a hit over power bat so far in his career, VanMeter might be the most recent example of a hitter taking advantage of the new ball. While this pace will not continue, it would not be shocking to the see VanMater push the overall line to 15 or more bombs over a full year.

Even more, his K rate is down this year. After a 20.2 K% the year before, this year that number sits at 17.6%. Add in a doubling of the BB%, and VanMeter is looking like a solid fantasy piece based on the supporting metrics. While he does not have a hit in four plate appearances, he did walk and steal a base off the bench. Expect him to find playing time, and this is the under-the-radar option to add this week.

Stock is up since this call was unexcepted, and there looks to be a real shot to stick around. While he will not be able to post numbers like the other prospect featured below, VanMater has the profile to take advantage of Great American. In NL-only leagues, this is a smart buy for limited time value, with long term upside.

 

Nick Senzel (2B/OF, CIN)

The second most anticipated debut of 2019, Senzel did not disappoint when he got his shot. Three homers through 20 plate appearances show the raw power, and owners will deal with the .200 batting line over a small sample. With a plus sprint speed carrying the overall five-tool profile, Senzel will be fun to watch this year. Not only will the power be there, but the underlying speed will boost run production as well as allow him to chip in double-digit steals.

The debut week did raise some questions, but also shows the impact that playing in Great American can have. This, plus the juiced ball, will add power upside to these plus hitting profiles like Senzel. For now, Senzel is owned everywhere, so there is not much of an opportunity to buy. For owners who already have him on the roster, ignore the chance to move him for value. With the power boost, this is the type of hitter that can win the Rookie of the Year.

 

Rookie Debuts - Stock Neutral

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

 

Nathaniel Lowe (1B, TB)

A highly touted bat entering the year, Lowe is up a bit sooner than expected. With a plus hit tool and plus power mark, Lowe should be an impact option once he gets up to speed. Nine hits in 30 plate appearances are only a good sign, and the power will come. What is encouraging is that he is seeing close to four pitches each at-bat, so he is not pushing even with the call-up. A solid RBI producer in the minors, Lowe will rely on the team to support these numbers, but the skills are there to be an across the roto-category producer.

If anything the stock is right where it should be, without the power to push up early expectations. The fact that he is already hitting means he should be around for an extended stretch. With a good team around him, and some great offensive parks in the American League East, Lowe is a must add where he is still available. The final note, and while the minors, is that Lowe never posted an wRC+ below 111 in his career, and that was over 52 game at High-A. The track record is there, and owners in need of an impact bat should be moving for this asset while the price is down with the name value.

 

Cal Quantrill (SP, SD)

After struggling over his time in the minors, the son of the former Big League pitcher, Quantrill finally got his chance to debut last week. So far, in two starts, he has pitched a total of 10 innings with eight Ks. His first start was much better with 5.2 innings and two runs allowed, but he did strike out more hitters over 4.1 innings in his second start. While length might seem to be an issue with 23 hitters being the cap in both starts. This means that he will need to be efficient to get to the needed five to record a win.

The downside with Quantrill is that since he got to the high minors, the stuff has been down. After a 23 K% to start his career, over the past three levels, that has dipped to 17.2%. While the walks have stayed in a 5-7% range, the ability to get swings-and-misses will be crucial to hanging with the Padres. He does not have the arm for the bullpen, so there is a bit of safety in the role for fantasy owners.

With two reliable starts against the Braves and Mets, Quantrill has flashed the skills to be effective. While the ceiling is also a bit low, the floor seems to be there for a safe SP4.

More MLB Prospects Analysis




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REAL-TIME FANTASY NEWS

Paul George

Won't Play Wednesday Night
Onyeka Okongwu

Available on Tuesday
Joel Embiid

Listed as Doubtful for Wednesday
Jalen Suggs

Available Tuesday
Zaccharie Risacher

Ruled Out With Hip Contusion vs. Pistons
Odell Beckham Jr.

Officially Reinstated by NFL Commissioner
Kristaps Porzingis

Ruled Out on Tuesday Night
Buddy Hield

Available for Tuesday's Matchup With Orlando
Matt Murray

to Miss Six Weeks With Lower-Body Injury
Ilya Lyubushkin

Out on Tuesday
Giannis Antetokounmpo

Out 1-2 Weeks With Groin Strain
Jamie Benn

Makes Season Debut Tuesday
Stephon Castle

Sidelined 1-2 Weeks
Evgenii Dadonov

on Track to Return Tuesday
Dougie Hamilton

a Game-Time Call Tuesday
Anthony Cirelli

Expected to Return Against Devils
Victor Hedman

Questionable for Tuesday
LeBron James

Aims to Make Season Debut Tuesday
Auston Matthews

to Miss at Least Two More Games
Grayson Allen

Sidelined on Tuesday
Gabe Vincent

Set to Suit Up Tuesday
C.J. Stroud

Expected to Return in Week 13 Against Colts
C.J. Stroud

to Miss Another Game
Jonathan Kuminga

Remains Out Tuesday
Keegan Murray

Could Make his Season Debut This Week
Caris LeVert

Liston as Out on Tuesday
Tobias Harris

Could Return Thursday
Ausar Thompson

Questionable Again on Tuesday
Joe Mixon

Uncertainty Remains Around Joe Mixon's Return Timeline
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
Alex Singleton

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

Doubtful Again in Week 12
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
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James Franklin to be Virginia Tech's Next Head Coach
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Beau Pribula Has Chance to Face Oklahoma on Saturday
Mitchell Marner

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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
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Limited to Handful of Minutes Sunday
Ryan Hartman

Suffers Lower-Body Injury
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
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Suffers Second-Round Knockout Loss
Leon Edwards

Carlos Prates Becomes The First Man To Knock Out Leon Edwards
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Benoit Saint Denis Knocks Out Beneil Dariush In 16 Seconds
Josh Naylor

Mariners Finalizing Five-Year Contract
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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

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