2025 Stats
W-L
0-0
ERA
0.00
WHIP
0.00
K
0
SV
0
Rest-of-Season Projections
Heads back to minors
The Mariners optioned Klein to Triple-A Tacoma on Thursday.
ANALYSIS
Klein was with the big club for only one day and did not make an appearance. He is making room on the roster for Emerson Hancock, who has been recalled to start Thursday in Cincinnati.
Klein was with the big club for only one day and did not make an appearance. He is making room on the roster for Emerson Hancock, who has been recalled to start Thursday in Cincinnati.
Pitching Stats
Loading Pitching Stats...
2025
2024
Minor League Game Log
Calculate Stats Over Time
Just click on any two dates.
Loading Minor League Pitching Game Log...
Left/Right Pitching Splits
Since 2023
-48%
BAA vs RHP
2025
No Stats
| BAA | K | BB | H | HR | |
|---|---|---|---|---|---|
| Since 2023vs Left | .538 | 2 | 3 | 7 | 0 |
| Since 2023vs Right | .278 | 5 | 3 | 5 | 0 |
| 2025vs Left | 0 | 0 | 0 | 0 | 0 |
| 2025vs Right | 0 | 0 | 0 | 0 | 0 |
| 2024vs Left | .538 | 2 | 3 | 7 | 0 |
| 2024vs Right | .278 | 5 | 3 | 5 | 0 |
| 2023vs Left | 0 | 0 | 0 | 0 | 0 |
| 2023vs Right | 0 | 0 | 0 | 0 | 0 |
Home/Away Pitching Splits
Since 2023
-82%
ERA at Home
2025
No Stats
| ERA | WHIP | IP | K/9 | BB/9 | |
|---|---|---|---|---|---|
| Since 2023Home | 6.00 | 2.17 | 6.0 | 7.5 | 4.5 |
| Since 2023Away | 33.75 | 3.75 | 1.1 | 13.5 | 20.3 |
| 2025Home | 0 | 0 | 0 | 0 | 0 |
| 2025Away | 0 | 0 | 0 | 0 | 0 |
| 2024Home | 6.00 | 2.17 | 6.0 | 7.5 | 4.5 |
| 2024Away | 33.75 | 3.75 | 1.1 | 13.5 | 20.3 |
| 2023Home | 0 | 0 | 0 | 0 | 0 |
| 2023Away | 0 | 0 | 0 | 0 | 0 |
Minor League Left/Right Pitching Splits (AAA)
Since 2023
Even Split
2025
-55%
BAA vs LHP
| BAA | K | BB | H | HR | |
|---|---|---|---|---|---|
| Since 2023vs Left | .240 | 41 | 30 | 36 | 3 |
| Since 2023vs Right | .239 | 64 | 34 | 43 | 5 |
| 2025vs Left | .167 | 7 | 2 | 2 | 0 |
| 2025vs Right | .375 | 6 | 5 | 6 | 0 |
| 2024vs Left | .219 | 19 | 13 | 16 | 3 |
| 2024vs Right | .179 | 24 | 19 | 15 | 2 |
| 2023vs Left | .277 | 15 | 15 | 18 | 0 |
| 2023vs Right | .275 | 34 | 10 | 22 | 3 |
Advanced Pitching Stats
Loading Advanced Pitching Stats...
Defensive Stats
Loading MLB Defensive Stats...
Stats Vs Today's Lineup
Want more matchup stats?
Loading Matchup Stats...
Our full team depth charts are reserved for RotoWire subscribers.
Subscribe Now
Recent RotoWire Articles Featuring Will Klein See More
Erik Siegrist sifts through the roster fallout in the American League from a busy trade deadline, but it's the Orioles' latest wave of elite prospects that could make the biggest impact.
Several big-name relievers changed teams at the deadline, with closers like Tanner Scott and Carlos Estevez heading into unclear situations with their new teams.
Erik Siegrist checks out the waiver wire in the American League and thinks Boston's David Hamilton should be getting more attention from fantasy GMs.
James Anderson goes team-by-team to highlight which pitching prospects could ascend to the closer role in the coming years, including A's righty Mason Miller.
Erik Siegrist dives into a deep free-agent pool after the trade deadline and expects Justin Verlander to be the top target among players crossing over to the American League.
More Fantasy News
Brought up from minors
The Mariners recalled Klein from Triple-A Tacoma on Wednesday, Daniel Kramer of MLB.com reports.
ANALYSIS
Subscribe now to instantly reveal our take on this news.
Subscribe now to instantly reveal our take on this news.
Optioned to Triple-A
The Mariners optioned Klein to Triple-A Tacoma on Friday.
ANALYSIS
Subscribe now to instantly reveal our take on this news.
Subscribe now to instantly reveal our take on this news.
Traded to Seattle
The Athletics traded Klein to the Mariners on Tuesday in exchange for international slot money.
ANALYSIS
Subscribe now to instantly reveal our take on this news.
Subscribe now to instantly reveal our take on this news.
Taken off 40-man roster
The Athletics designated Klein for assignment Friday.
ANALYSIS
Subscribe now to instantly reveal our take on this news.
Subscribe now to instantly reveal our take on this news.
Shelved at Triple-A
Triple-A Las Vegas placed Klein on its 7-day injured list Aug. 31 with an unspecified injury.
ANALYSIS
Subscribe now to instantly reveal our take on this news.
Subscribe now to instantly reveal our take on this news.