RADIO
Coby Mayo is a fantasy baseball waiver wire stash for Week 9 (2025). Target Coby Mayo as a top prospect free-agent waiver wire pickup for fantasy baseball.
BALLER MOVE: Add in 12+ team leagues
CALL-UP ETA: June
ANALYSIS: Baltimore Orioles third base prospect Coby Mayo has been one of the best power hitters at Triple-A over the past two seasons but has yet to take the next step at the major league level. Last summer, Mayo made his MLB debut but only appeared in 17 games and held a low .098/.196/.098 line with just four hits (all singles).
Earlier this season, the Orioles opted to give Mayo another taste of the majors, but once again limited his role. During this stint, the No. 17-ranked prospect in the sport appeared in just four contests and tallied one hit (a single) and held a 6:1 K:BB.
While his playing time and production in the majors have been disappointing, Mayo has flashed elite upside at Triple-A. Last season during his first stint at Triple-A Norfolk, the former fourth-round pick posted an impressive .287/.364/.562 slash line with 23 doubles and 22 long balls across 89 games.
This season, he has taken a slight step back but has remained productive in the power department, holding a .224/.319/.460 line with eight home runs across 43 games.
I still believe in Coby Mayo pic.twitter.com/2E11mVsouE
— 𝙆am Brice (@kambrice1tv) May 26, 2025
Given Baltimore's disappointing start to the season and Jordan Westburg's (hamstring) lingering absence, Mayo would provide a much-needed spark to the lineup if given the playing time. Ramon Urias has seen most of the starts at third base with Westburg on the shelf and has posted a .718 OPS. If Mayo continues to hit for power at Triple-A, expect the Orioles to finally give him an extended look.
- Written by Andy Smith
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:
| Rank | Player | Pos | Team | ETA |
| 1 | Roman Anthony | OF | BOS | June |
| 2 | Bubba Chandler | SP | PIT | June |
| 3 | Jacob Misiorowski | SP | MIL | June |
| 4 | Jac Caglianone | 1B | KCR | July |
| 5 | Andrew Painter | SP | PHI | June |
| 6 | Samuel Basallo | C | BAL | July |
| 7 | Moises Ballesteros | 3B | CHC | July |
| 8 | Chase DeLauter | OF | CLE | June |
| 9 | Brady House | 3B | WAS | June |
| 10 | Kyle Teel | C | CHW | July |
| 11 | Coby Mayo | 3B | BAL | July |
| 12 | Cole Young | 2B/SS | SEA | June |
| 13 | Chase Burns | SP | CIN | August |
| 14 | Ryan Ritter | SS | COL | June |
| 15 | Deyvison De Los Santos | 1B | MIA | June |
| 16 | Otto Kemp | 3B | PHI | June |
| 17 | Justin Crawford | OF | PHI | July |
| 18 | Shay Whitcomb | INF | HOU | July |
| 19 | Thomas Saggese | INF | STL | June |
| 20 | Colby Thomas | OF | ATH | July |
| 21 | Rhett Lowder | SP | CIN | July |
| 22 | Zac Veen | OF | COL | June |
| 23 | Jonathon Long | 3B | CHC | July |
| 24 | Emmanuel Rodriguez | OF | MIN | July |
| 25 | Carson Williams | SS | TBR | July |
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:
| Rank | Player | Position | Team | Age | ETA | Prev |
| 1 | Roman Anthony | OF | BOS | 21.01 | 2025 | 1 |
| 2 | Leodalis De Vries | SS | SDP | 18.6 | 2027 | 18 |
| 3 | Nick Kurtz | 1B | ATH | 22.18 | Debuted | 12 |
| 4 | Jesus Made | SS | MIL | 18.02 | 2027 | 16 |
| 5 | Jordan Lawlar | 2B/SS | ARI | 22.84 | Debuted | 15 |
| 6 | Konnor Griffin | SS/OF | PIT | 19.06 | 2027 | 27 |
| 7 | Travis Bazzana | 2B | CLE | 22.72 | 2025 | 6 |
| 8 | Sebastian Walcott | SS | TEX | 19.18 | 2026 | 5 |
| 9 | Max Clark | OF | DET | 20.4 | 2026 | 8 |
| 10 | J.J. Wetherholt | SS | STL | 22.69 | 2026 | 11 |
| 11 | Zyhir Hope | OF | LAD | 20.32 | 2026 | 19 |
| 12 | Walker Jenkins | OF | MIN | 20.24 | 2026 | 4 |
| 13 | Matt Shaw | 3B | CHC | 23.53 | Debuted | 7 |
| 14 | Josue De Paula | OF | LAD | 19.98 | 2026 | 34 |
| 15 | Samuel Basallo | C/1B | BAL | 20.76 | 2025 | 13 |
| 16 | Bubba Chandler | P | PIT | 22.67 | 2025 | 29 |
| 17 | Coby Mayo | 3B | BAL | 23.44 | Debuted | 17 |
| 18 | EmManuel Rodriguez | OF | MIN | 22.22 | 2025 | 10 |
| 19 | Andrew Painter | P | PHI | 22.1 | 2025 | 14 |
| 20 | Jackson Jobe | P | DET | 22.8 | Debuted | 9 |
| 21 | Kevin McGonigle | 2B/SS | DET | 20.75 | 2026 | 20 |
| 22 | Jac Caglianone | 1B | KCR | 22.27 | 2025 | 30 |
| 23 | Dalton Rushing | C/1B | LAD | 24.24 | Debuted | 23 |
| 24 | Felnin Celesten | SS | SEA | 19.67 | 2027 | 28 |
| 25 | Chase DeLauter | OF | CLE | 23.61 | 2025 | 21 |
| 26 | Marcelo Mayer | SS | BOS | 22.43 | 2025 | 38 |
| 27 | Chase Burns | P | CIN | 22.33 | 2026 | 46 |
| 28 | Lazaro Montes | OF | SEA | 20.57 | 2026 | 39 |
| 29 | Bryce Eldridge | 1B | SFG | 20.57 | 2025 | 24 |
| 30 | Robert Calaz | OF | COL | 19.48 | 2027 | 31 |
| 31 | Noah Schultz | P | CHW | 21.78 | 2025 | 26 |
| 32 | Cam Smith | OF | HOU | 22.23 | Debuted | 36 |
| 33 | Braden Montgomery | OF | CHW | 22.06 | 2026 | 37 |
| 34 | Agustin Ramirez | C/1B | MIA | 23.69 | Debuted | 45 |
| 35 | Travis Sykora | P | WAS | 21.05 | 2026 | 41 |
| 36 | Bryce Rainer | SS | DET | 19.87 | 2027 | 61 |
| 37 | Moises Ballesteros | C | CHC | 21.5 | Debuted | 60 |
| 38 | Carson Williams | SS | TBR | 21.9 | 2025 | 25 |
| 39 | Jonny Farmelo | OF | SEA | 20.44 | 2026 | 43 |
| 40 | Emil Morales | SS | LAD | 18.65 | 2027 | 42 |
| 41 | Colt Emerson | SS | SEA | 19.82 | 2026 | 32 |
| 42 | Chase Dollander | P | COL | 23.56 | Debuted | 47 |
| 43 | Luis Pena | 3B/SS | MIL | 18.62 | 2027 | 134 |
| 44 | Thomas White | P | MIA | 20.63 | 2026 | 68 |
| 45 | Luke Keaschall | 2B | MIN | 22.76 | Debuted | 48 |
| 46 | Aidan Smith | OF | TBR | 20.82 | 2026 | 40 |
| 47 | Jett Williams | SS/OF | NYM | 21.54 | 2025 | 53 |
| 48 | Michael Arroyo | 2B | SEA | 20.53 | 2026 | 35 |
| 49 | Jacob Misiorowski | P | MIL | 23.12 | 2025 | 76 |
| 50 | Colby Thomas | OF | ATH | 24.31 | 2025 | 52 |
Popular Player Comparison Searches - Who To Pickup?
Below are some popular searches and comparisons from our fantasy baseball Who To Pickup tool for Coby Mayo 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
Brandon Lowe or Matt Shaw
Colin Rea or Zebby Matthews
Bubba Chandler or Zebby Matthews
Jackson Jobe or Bubba Chandler
Jasson Dominguez or Jordan Lawlar
Logan Henderson or Zebby Matthews
Sandy Alcantara or Roman Anthony
Chandler Simpson or Jac Caglianone
Gunnar Hoglund or Bubba Chandler
Hayden Birdsong or Bubba Chandler
Jack Leiter or Bubba Chandler
Jacob Misiorowski or Zebby Matthews
Zebby Matthews or Chandler Simpson
Andy Pages or Roman Anthony
Clayton Kershaw or Bubba Chandler
Colin Rea or Zebby Matthews
Drake Baldwin or Dalton Rushing
Gunnar Hoglund or Logan Henderson
Gunnar Hoglund or Zebby Matthews
Hayden Birdsong or Zebby Matthews
Hyeseong Kim or Jordan Lawlar
Jack Leiter or Zebby Matthews
Jack Leiter or Zebby Matthews
Reese Olson or Bubba Chandler
Tony Gonsolin or Bubba Chandler
Zebby Matthews or Bubba Chandler
Zebby Matthews or Jacob Misiorowski
Bubba Chandler or Chandler Simpson
Bubba Chandler or Roman Anthony
Chandler Simpson or Jordan Lawlar
Chase Meidroth or Matt Shaw
Chase Meidroth or Robert Hasselliii
Chris Martin or Chandler Simpson
Daulton Varsho or Marcelo Mayer
David Festa or Zebby Matthews
Daysbel Hern%C3%A1Ndez or Zebby Matthews
Drake Baldwin or Dalton Rushing
Drake Baldwin or Moises Ballesteros
Gavin Lux or Marcelo Mayer
Ivan Herrera or Zebby Matthews
Jac Caglianone or Chandler Simpson
Jac Caglianone or Zebby Matthews
Jack Leiter or Bubba Chandler
Jacob Misiorowski or Bubba Chandler
Jacob Wilson or Zebby Matthews
Jake Cronenworth or Chandler Simpson
Jake Meyers or Zebby Matthews
Jasson Dominguez or Jordan Lawlar
Jonathan Aranda or Jordan Lawlar
Josh Lowe or Jordan Lawlar
Kyle Stowers or Jordan Lawlar
Logan Henderson or Jacob Misiorowski
Logan Henderson or Zebby Matthews
Masyn Winn or Jordan Lawlar
Matt Shaw or Marcelo Mayer
Matthew Liberatore or Logan Henderson
Mitchell Parker or Bubba Chandler
Nick Kurtz or Bubba Chandler
Nick Kurtz or Roman Anthony
Porter Hodge or Jordan Lawlar
Ryan Weathers or Bubba Chandler
Ryan Weathers or Bubba Chandler
Will Benson or Chandler Simpson
Zebby Matthews or Bubba Chandler
Zebby Matthews or Jordan Lawlar
Zebby Matthews or Matt Shaw
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