Marcelo Mayer - Fantasy Baseball Prospects Waiver Wire Pickups (Week 10)

Marcelo Mayer is a fantasy baseball waiver wire pickup for Week 10 (2025). Target Marcelo Mayer as a top prospect free-agent add for fantasy baseball.

BALLER MOVE: Add in all leagues

ROSTERED IN: 26% of Leagues

ANALYSIS: Two of the Red Sox's "big three" are now in the majors following Marcelo Mayer's promotion on May 24. With Boston struggling and falling deeper below the .500 mark and in the American League East standings, it shouldn't be too long before we see Roman Anthony, too. And let's face it -- the Red Sox desperately need a spark.

Mayer was selected fourth overall in the 2021 MLB Draft out of Eastlake High School in California. He immediately got off to a roaring start in the rookie ball that summer, posting a .817 OPS in 26 games.

Mayer followed that up in 2022 with a .280/.399/.489 slash line and 13 homers between Low-A and High-A. By then, the league began taking notice of him, ranking Mayer No. 14 on MLB.com's Top 100 Prospects list. He was promoted to Double-A midway through the 2023 campaign but batted just .189 in 43 games to end the year. However, an injury sidelined him for most of August.

In 2024, Mayer appeared in 77 more Double-A games, looking more like his former self. He notched 36 extra-base hits, 38 RBI, 30 walks, and 13 stolen bases, striking out 66 times in 335 plate appearances, but saw injuries cut his season short.

He dropped out of the top-10 prospects, coming in at No. 15, but returned in 2025, at No. 8. An .818 OPS and nine homers in 43 games at Triple-A were all the Red Sox needed to see before finally calling up Mayer to the majors in May.

Through five games with the Red Sox, Mayer has looked the part. The 22-year-old has seemed unfazed by big-league pitching, displaying a maturity about him, even batting in the clean-up spot. His quick, left-handed swing allows him to make contact against high-velocity pitches, something the rest of Boston's lineup grapples with.

Mayer has doubled twice and totaled seven bases in 20 plate appearances thus far, with the below hit coming off the bat at 105.1 mph, his hardest-hit ball that resulted in a hit since his debut.

Marcelo Mayer’s first double of his career.

Just such a smooth and effortless swing. pic.twitter.com/ImtqzgViXB

— Tyler Milliken (@tylermilliken_) May 25, 2025

He hasn't looked outmatched in a small sample size, unlike Kristian Campbell, who has appeared overwhelmed at the plate at times early in his rookie campaign. That said, Mayer has cons, too, with an above-average groundball rate and tendency to drive the ball rather than lift it.

Mayer has all of the tools to succeed at the MLB level and should be added in all standard formats.

- Written by Lauren Amour

Top Prospect Rankings and 2025 Call-Up ETAs

You can also check out RotoBaller's fantasy baseball prospect rankings for 2025. Eric Cross updates the below rankings weekly for the top impact prospects for 2025, and when they may be called up:

Top Prospect Dynasty Rankings

Looking for longer term fantasy baseball prospect rankings? You can also check out RotoBaller's top dynasty prospect rankings from Eric Cross:

Popular Player Comparison Searches - Who To Pickup?

Below are some popular searches and comparisons from our fantasy baseball Who To Pickup tool for Marcelo Mayer and others. You can also use the free Who Should I Pickup tool to run your own waiver wire comparisons, up to four players at once:

Zebby Matthews or Logan Henderson
Bubba Chandler or Zebby Matthews
Will Warren or Zebby Matthews
Zebby Matthews or Bubba Chandler
Chase Meidroth or Matt Shaw
Brandon Lowe or Matt Shaw
Jacob Misiorowski or Zebby Matthews
Jackson Jobe or Bubba Chandler
Matt Shaw or Marcelo Mayer
Zebby Matthews or Jacob Misiorowski
Bubba Chandler or Zebby Matthews
Colin Rea or Zebby Matthews
Zebby Matthews or Cade Horton
Drake Baldwin or Dalton Rushing
Hayden Birdsong or Bubba Chandler
Hayden Birdsong or Zebby Matthews
Logan Henderson or Zebby Matthews
Chandler Simpson or Jac Caglianone
Jack Leiter or Bubba Chandler
Jasson Dominguez or Jordan Lawlar
Sandy Alcantara or Roman Anthony
Jac Caglianone or Zebby Matthews
Jacob Misiorowski or Bubba Chandler
Logan Henderson or Jacob Misiorowski
Shane Smith or Cade Horton
Bubba Chandler or Nick Kurtz
Dillon Dingler or Nick Kurtz
Gunnar Hoglund or Zebby Matthews
Josh Lowe or Jordan Lawlar
Nick Kurtz or Bubba Chandler
Ryan Weathers or Bubba Chandler
Andrew Abbott or Cade Horton
Ben Rice or Nick Kurtz
Bubba Chandler or Chandler Simpson
Clayton Kershaw or Bubba Chandler
David Festa or Zebby Matthews
Drake Baldwin or Dalton Rushing
Gavin Lux or Marcelo Mayer
Gunnar Hoglund or Bubba Chandler
Gunnar Hoglund or Cade Horton
Gunnar Hoglund or Logan Henderson
Jack Leiter or Zebby Matthews
Jack Leiter or Zebby Matthews
Kyle Manzardo or Nick Kurtz
Nick Kurtz or Roman Anthony
Reese Olson or Bubba Chandler
Shane Smith or Jac Caglianone
Spencer Steer or Chandler Simpson
Zebby Matthews or Bubba Chandler
Zebby Matthews or Bubba Chandler
Zebby Matthews or Bubba Chandler
Zebby Matthews or Chandler Simpson
Bubba Chandler or Jacob Misiorowski
Bubba Chandler or Roman Anthony
Chandler Simpson or Jordan Lawlar
Colin Rea or Zebby Matthews
Daulton Varsho or Marcelo Mayer
Grant Holmes or Bubba Chandler
Hyeseong Kim or Jordan Lawlar
Jac Caglianone or Chandler Simpson
Jack Leiter or Bubba Chandler
Jack Leiter or Jacob Misiorowski
Josh Lowe or Matt Shaw
Marcelo Mayer or Matt Shaw
Masyn Winn or Jordan Lawlar
Tj Friedl or Roman Anthony
Tony Gonsolin or Bubba Chandler
Trey Sweeney or Marcelo Mayer
Will Benson or Chandler Simpson
Wilmer Flores or Nick Kurtz
Zebby Matthews or Jac Caglianone
Addison Barger or Jac Caglianone
Agustin Ramirez or Marcelo Mayer
Andy Pages or Roman Anthony
Austin Hays or Marcelo Mayer
Ben Rice or Chandler Simpson
Ben Rice or Marcelo Mayer
Bubba Chandler or Cade Horton
Bubba Chandler or Jacob Misiorowski
Bubba Chandler or Zebby Matthews
Camilo Doval or Bubba Chandler
Chandler Simpson or Bubba Chandler
Chase Meidroth or Chandler Simpson
Chase Meidroth or Robert Hasselliii
Drake Baldwin or Moises Ballesteros
Gavin Sheets or Marcelo Mayer
Grant Holmes or Cade Horton
Hayden Birdsong or Cade Horton
Hayden Birdsong or Cade Horton
Ivan Herrera or Matt Shaw
Ivan Herrera or Zebby Matthews
Jac Caglianone or Matt Shaw
Jac Caglianone or Roman Anthony
Jacob Misiorowski or Cade Horton
Jake Cronenworth or Chandler Simpson
Jake Meyers or Zebby Matthews
Joe Boyle or Bubba Chandler
Jonathan Aranda or Bubba Chandler
Jordan Lawlar or Dalton Rushing
Jordan Lawlar or Dalton Rushing
Josh Lowe or Jac Caglianone
Logan Henderson or Cade Horton
Logan Henderson or Zebby Matthews
Logan Henderson or Zebby Matthews
Marcelo Mayer or Nick Kurtz
Masyn Winn or Chandler Simpson
Matt Shaw or Jac Caglianone
Matthew Liberatore or Cade Horton
Mitchell Parker or Bubba Chandler
Nick Kurtz or Bubba Chandler
Noah Cameron or Bubba Chandler
Porter Hodge or Jordan Lawlar
Roman Anthony or Bubba Chandler
Roman Anthony or Nick Kurtz
Roman Anthony or Zebby Matthews
Ronny Henriquez or Chandler Simpson
Ryan Weathers or Bubba Chandler
Ryan Weathers or Cade Horton
Ryan Weathers or Nick Kurtz
Trent Grisham or Nick Kurtz
Will Benson or Marcelo Mayer
Will Warren or Zebby Matthews
Zebby Matthews or Bubba Chandler
Zebby Matthews or Bubba Chandler
Zebby Matthews or Bubba Chandler
Zebby Matthews or Cade Horton
Zebby Matthews or Jacob Misiorowski
Zebby Matthews or Jacob Misiorowski
Zebby Matthews or Matt Shaw
Zebby Matthews or Nick Kurtz

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