Loading players...
Will Klein played 2 major-league seasons (2024-2025) as a P (22). Career totals and every year-by-year line below come from the SABR/Lahman database (CC BY-SA), covering 1871-2025.
Showing 2 season lines
| Year | Age | Team | G | GS | W | L | SV | IP | SO | BB | ERA | ERA+ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 | 25 | KCA|OAK | 8 | 0 | 1 | 0 | 0 | 7.1 | 7 | 6 | 11.05 | 36 |
| 2025 | 26 | LAN | 14 | 0 | 1 | 1 | 0 | 15.1 | 21 | 10 | 2.35 | 180 |
| Year | Pos | G | GS | PO | A | E | DP |
|---|---|---|---|---|---|---|---|
| 2024 | P | 8 | 0 | 0 | 2 | 0 | 0 |
| 2025 | P | 14 | 0 | 0 | 3 | 0 | 0 |
Team codes are the source codes (e.g. NYN for the New York Mets, BS1 for the 1875 Boston club). OPS+ is league-season normalized, not park-adjusted; unrecorded source values (such as RBI in the earliest recorded seasons) are absent, never zero-filled.
Will Klein is a playable Legends Deck card, rated from real Statcast data and refreshed nightly: view the Will Klein card.
Will Klein appears in 3 archived official MLB transactions (2 trades), newest first.
| Date | Type | From | To | Details |
|---|---|---|---|---|
| Jun 2, 2025 | Trade | Seattle Mariners | Los Angeles Dodgers | Seattle Mariners traded RHP Will Klein to Los Angeles Dodgers for LHP Joe Jacques. |
| Jan 21, 2025 | Trade | Athletics | Seattle Mariners | Athletics traded RHP Will Klein to Seattle Mariners for Other Considerations. |
| Jun 23, 2020 | Signed | — | Kansas City Royals | Kansas City Royals signed RHP Will Klein. |
From MLB’s official StatsAPI transactions feed (2011 to the current season, trades/signings/releases involving major-league clubs). Browse the full archive.
Every career total and season line is computed from the SABR / Sean Lahman baseball database (2025 edition, CC BY-SA 3.0), the same source behind our historical position leaderboards. Rate stats use league-season normalization only (OPS+ and ERA+ as marked, never park-adjusted); unrecorded early-era values stay absent rather than being invented. Career totals sum only what the source records.
Award winners and MVP / Cy Young / Rookie of the Year voting history come from the same database; the year pages live under MLB award voting history. Official transactions (2011 to the current season) come from the MLB StatsAPI feed on our transactions archive.