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Coby Mayo - Fantasy Baseball Prospects Waiver Wire Stashes (Week 9)

Coby Mayo - Fantasy Baseball Prospects, Draft Sleepers, MLB Rookies

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.

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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