X
Lost password?

Don't have an account?
Gain Access Now

X

Receive free daily analysis

NFL
NBA
NHL
NASCAR
CFB
MLB
MMA
PGA
ESPORTS
BETTING

Already have an account? Log In

X

Forgot Password


POPULAR FANTASY TOOLS

Expert Advice
Articles & Tools
Import Your Leagues
Daily Stats & Leaders
All Pitcher Matchups
Compare Any Players
Compare Any Players
Rookies & Call-Ups
24x7 News and Alerts

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

More Fantasy Baseball Advice



Download Our Free News & Alerts Mobile App

Like what you see? Download our updated fantasy baseball app for iPhone and Android with 24x7 player news, injury alerts, sleepers, prospects & more. All free!




Check out RotoBaller's entire fantasy baseball waiver wire pickups and sleepers list, updated daily!

POPULAR FANTASY TOOLS

Expert Advice
Articles & Tools
Import Your Leagues
Daily Stats & Leaders
All Pitcher Matchups
Compare Any Players
Compare Any Players
Rookies & Call-Ups
24x7 News and Alerts

REAL-TIME FANTASY NEWS

Bradley Beal

Heading to Los Angeles to Join Clippers After Contract Buyout
Rayan Rupert

Scores 24 Points in Summer League Win
Kurtis Rourke

Starting Training Camp on NFI List
Derik Queen

Collects Third Consecutive Double-Double in Summer League Loss
GG Jackson II

Records 13 Points in Summer League Action on Tuesday
Johni Broome

Logs Double-Double Against Wizards
Micah Parsons

Not Worried About Extension Talks
Jahdae Barron

Broncos Agree to Terms With Jahdae Barron on Rookie Deal
Tyrone Broden

Seahawks Place Tyrone Broden, Montorie Foster on NFI List
DaRon Holmes II

Records Double-Double in Summer League Loss to Raptors
Landon Jackson

Lands on PUP List
Kyle Schwarber

Named All-Star Game MVP
Harris English

Takes Stellar 2025 Performance to The Open Championship
Aldrich Potgieter

Seeks Better Result in Northern Ireland
Ja'Kobe Walter

Produces Big Numbers at Both Ends Against Nuggets
Cameron Young

Likely to Hang Around at The Open Championship
Ajay Mitchell

Outstanding Against Magic Tuesday
Cameron Smith

Just Trying to Make the Cut at Royal Portrush
Jordan Spieth

Is Jordan Spieth Still a Natural for Links Style Golf?
VJ Edgecombe

Busy in Las Vegas Summer League Debut
Patrick Reed

a Viable Option at The Open Championship
PGA

Sungjae Im Wants to Rebound from Last Experience at Royal Portrush
Dominick Barlow

to Sit Out Rest of Summer League
Xander Schauffele

Looks to Defend His Claret Jug at Royal Portrush
Tony Finau

Trying to Turn Tide at Royal Portrush
NBA

Oshae Brissett Links Up with Maccabi Tel Aviv
Daniel Brown

Seeks a Rebound at The Open Championship
Rory McIlroy

Will be the Most Watched Player This Week at Royal Portrush
Charlotte Hornets

Josh Okogie Waived by Hornets
Daniel Berger

Trending Poorly as The Open Championship Looms
Clayton Kershaw

Retires Both Batters In ASG Appearance
Eugenio Suárez

Eugenio Suarez Hit In Pinky In All-Star Game, X-Rays Negative
MLB

NL All-Stars Win On Tie-Breaker Home Run Swing-Off
Junior Colson

Competing for Starting Job
Isaiah Likely

Ravens Looking to Extend Isaiah Likely
Kyle Pitts

Not in Falcons' Long-Term Plans?
Quinshon Judkins

Browns in "No Rush" to Sign Quinshon Judkins to Rookie Deal
Robert MacIntyre

Hoping to Bounce Back at Open Championship
Shane Lowry

Hopes to Repeat at Royal Portrush
Brian Harman

Hopes to Rekindle Some Magic at the 153rd Open
JC Latham

Could be Looking at Big Improvement in Second Season
Tykee Smith

Could be Every-Down Player for Bucs
Derick Hall

has High Ceiling Going into Third Season
Kaleb Johnson

an Ideal Scheme Fit in Pittsburgh
UTA

Michael Carcone Returns to Utah on One-Year Contract
Kelee Ringo

Will Get his Chance in 2025
Bowen Byram

Signs Two-Year Deal with Sabres
Kool-Aid McKinstry

in Line to Start
Chop Robinson

Double-Digit Sack Season Well Within Reach for Chop Robinson
Morgan Barron

Jets Re-Sign Morgan Barron for Two Years
Brian Thomas Jr.

Could be Even Better in 2025
Laiatu Latu

Primed to Take a Step Forward
Terrion Arnold

Lions Expecting Year 2 Jump From Terrion Arnold
Omarion Hampton

Could Become Lead Back Sooner Than Later
Zion Johnson

Moving to Center
Dereck Lively II

Undergoes Right-Foot Surgery Tuesday
Isaiah Collier

Logs a Double-Double in Summer League Action on Monday
Devin Carter

Posts 17 Points Versus Suns
Bronny James Jr.

Scores 17 Points in Summer League Loss
Harrison Ingram

has Impressive Outing Against Jazz
PGA

Chris Gotterup Punches Ticket to Royal Portrush With Win at Scottish Open
Bryson DeChambeau

Hopes to Reverse Links Golf Struggle at the 153rd Open
Keegan Bradley

Needs to Find The Weekend at Royal Portrush for Ryder Cup Hopes
Kyle Filipowski

Records 35-Point Double-Double Against Spurs
Kel'el Ware

Dominates Against Celtics
Kon Knueppel

Gets Going Monday
Matas Buzelis

Puts Up 28 Points in Win Over Pacers
Oneil Cruz

Ties Home Run Derby Distance Record
Cal Raleigh

Wins 2025 Home Run Derby
Justin Thomas

Finishes Tied For 22nd at Genesis Scottish Open
Scottie Scheffler

Finishes Tied For Eighth at Genesis Scottish Open
Jon Rahm

Finishes in Second at LIV Andalucia
Tallison Teixeira

Suffers First-Round TKO
Derrick Lewis

Scores First-Round TKO
Michael Lorenzen

Royals Put Michael Lorenzen on Injured List With Oblique Strain
Stephen Thompson

Loses Controversial Split Decision
Gabriel Bonfim

Wins Controversial Split Decision
Calvin Kattar

Gets Outclassed At UFC Nashville
Steve Garcia

Extends His Win Streak
Nate Landwehr

Gets Knocked Out
Morgan Charrière

Morgan Charriere Scores Third-Round Knockout
Austen Lane

Suffers Submission Loss
Vitor Petrino

Scores First-Round Submission In Heavyweight Debut
Tuco Tokkos

Earns His First UFC Win
Junior Tafa

Unsuccessful in his Light-Heavyweight Debut
Chase Elliott

Charges to A Finish of Third At Sonoma
Chase Briscoe

Finishes Second With his First Career Road-Course Top-Five at Sonoma
Christopher Bell

Rollercoaster Day Ends With Top-5 Finish at Sonoma
William Byron

Maintains the Regular-Season Points Lead
Kyle Busch

Earns A Hard-Fought Top-10 Finish At Sonoma
Alex Ovechkin

Not Thinking About Retirement
PIT

Penguins Acquire Arturs Silovs
NHL

Nikolai Kovalenko Returns to Russia
Yoshinobu Yamamoto

Tosses Gem Against Giants
Shota Imanaga

Shuts Down Yankees on Sunday
Nathan Eovaldi

Dominant Again in Seventh Win
Tyler Reddick

Evades Near Upset to Remain Alive in In-Season Challenge
Ty Gibbs

One of Three Tylers to Make In-Season Challenge Semifinals
Kyle Larson

Curiously Mediocre at Sonoma Before Late-Race Crash
NASCAR

John H. Nemechek Edges Out Teammate to Make In-Season Challenge Semifinal
Alex Bowman

Ty Dillon Bumps Alex Bowman to Advance to In-Season Challenge Semifinal
Chicago White Sox

Billy Carlson Goes 10th Overall to White Sox
Cincinnati Reds

Steele Hall Selected Ninth by Cincinnati
Toronto Blue Jays

Blue Jays Select JoJo Parker with Eighth Overall Pick
Miami Marlins

Marlins Select Aiva Arquette With Seventh Overall Pick
Pittsburgh Pirates

Pirates Select Seth Hernandez with Sixth Overall Pick
Kyle Stowers

Punishes Former Team with Three-Homer Game
St. Louis Cardinals

Cardinals Select Liam Doyle with Fifth Overall Pick
Colorado Rockies

Rockies Select Ethan Holliday Fourth Overall
Seattle Mariners

Kade Anderson Selected Third Overall by Seattle
Ha-Seong Kim

X-rays on Ha-Seong Kim's Foot Come Back Negative
Los Angeles Angels

Tyler Bremner Selected Second Overall by Angels in 2025 MLB Draft
Shane Van Gisbergen

Can Anyone Beat Shane van Gisbergen at Sonoma?
Tyler Reddick

Better at Sonoma Than Record Shows
Chase Elliott

a Prime DFS Option at Sonoma
Michael McDowell

Struggling a Bit at Sonoma
NASCAR

Christopher Bell Has Never Finished Better Than Ninth at Sonoma
Ryan Blaney

Has Top-10 Upside at Sonoma
NASCAR

Sunday at Sonoma Will Likely Be a Long Race for Bubba Wallace
Kyle Larson

Is A Likely Top-Five Contender for Sonoma
Ryan Preece

Points Position Could Affect Race at Sonoma
Todd Gilliland

Struggling to Find Speed at Sonoma
Ty Gibbs

May be an Underrated Favorite to Compete for the Win at Sonoma
Erik Karlsson

Open to Move Away From Pittsburgh
Zach Hyman

Hopes to be Ready for Start of Next Season
SJ

Jeff Skinner Joins Sharks on One-Year Contract
Ryan Reaves

Traded to Sharks
Vladislav Kolyachonok

Moves to Dallas
Matt Dumba

Lands in Pittsburgh
Mackie Samoskevich

Re-Signs with Panthers on One-Year Deal
Josh Manson

Inks Two-Year Extension with Avalanche
EDM

Isaac Howard Signs Three-Year, Entry-Level Contract With Oilers
Tallison Teixeira

Set For His First UFC Main Event
Derrick Lewis

Set To Headline UFC Nashville
Gabriel Bonfim

Looks For His Third UFC Win
Stephen Thompson

Returns At UFC Nashville
Steve Garcia

Looks To Extend His Win Streak
Calvin Kattar

In Dire Need Of Victory
Morgan Charrière

Morgan Charriere A Favorite At UFC Nashville
Nate Landwehr

Aims To Bounce Back
MMA

Austen Lane Looks To Get Back In The Win Column
RANKINGS
C
1B
2B
3B
SS
OF
SP
RP

RANKINGS

QB
RB
WR
TE
K
DEF