Will Klein
Pitcher · Career Stats, Bio & Records (2024-2026)
Will Klein is a pitcher who has played in Major League Baseball since 2024 for 4 teams, including the Kansas City Royals, a span of 3 seasons. Across 58 career appearances, he has gone 5-5 with a 4.20 ERA and 77 strikeouts. His career Pitcher PIV — Baseball Data Hub's era-adjusted measure of pitching impact — is 544.0.
- W (Wins):
- Games credited to a pitcher whose team took a lead it never surrendered while he was the pitcher of record.
- ERA (Earned Run Average):
- Earned runs allowed per nine innings pitched: (ER × 9) ÷ IP. The primary measure of pitching effectiveness.
- SO (Strikeouts):
- For a batter, times retired on a third strike; for a pitcher, batters retired on a third strike.
- WHIP (Walks and Hits per Inning Pitched):
- Baserunners allowed per inning: (BB + H) ÷ IP. Under 1.00 is elite.
Data updated
- Position
- Pitcher
- Bats / Throws
- R / R
- Height / Weight
- 6'5" / 230 lb
- MLB Debut
- 2024-04-28
Full name: William Boone Klein
Season-by-Season Pitching
Click a stat to plot it across every season.
| Year | Team | Lg | W | L | G | GS | CG | SHO | SV | IP | H | ER | BB | SO | ERA | Lg ERA | Pitcher PIV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 | KCA | AL | 1 | 0 | 5 | 0 | 0 | 0 | 0 | 5.2 | 10 | 4 | 2 | 6 | 6.35 | — | 0.0 |
| 2024 | OAK | AL | 0 | 0 | 3 | 0 | 0 | 0 | 0 | 1.2 | 2 | 5 | 4 | 1 | 27.00 | — | 0.0 |
| 2025 | LAN | NL | 1 | 1 | 14 | 0 | 0 | 0 | 0 | 15.1 | 14 | 4 | 10 | 21 | 2.35 | 4.16 (+44%) | 544.0 |
| 2026 | LAD | NL | 3 | 4 | 36 | 3 | 0 | 0 | 2 | 41.2 | 44 | 17 | 21 | 49 | 3.67 | 4.18 (+12%) | - |
| Career · 4 seasons | 5 | 5 | 58 | 3 | 0 | 0 | 2 | 64.1 | 70 | 30 | 37 | 77 | 4.20 | — | 544 | ||
Lg columns show the league average for that season, with the player's figure as a percentage above or below it. Career totals the seasons listed above.
Season-by-Season Batting
Click a stat to plot it across every season.
| Year | Team | Lg | G | AB | R | H | 2B | 3B | HR | RBI | SB | BB | SO | AVG | Lg AVG | Lg OBP | Lg SLG | Lg OPS | PIV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 | KCA | AL | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | — | — | — | — | 0.0 |
| 2024 | OAK | AL | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | — | — | — | — | 0.0 |
| 2025 | LAN | NL | 14 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | — | — | — | — | 0.0 |
| Career · 3 seasons | 22 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | — | — | — | — | — | 0 | ||
Lg columns show the league average for that season, with the player's figure as a percentage above or below it. Career totals the seasons listed above.
Game Log & Splits
View full game log (44 games) →Per-game data from Retrosheet (regular season, through 2025).
Batting — Home / Away
| Split | G | AB | R | H | HR | RBI | AVG |
|---|---|---|---|---|---|---|---|
| Home | 14 | 0 | 0 | 0 | 0 | 0 | — |
| Away | 8 | 0 | 0 | 0 | 0 | 0 | — |
Pitching — Home / Away
| Split | G | IP | H | ER | BB | SO | ERA |
|---|---|---|---|---|---|---|---|
| Home | 14 | 13.2 | 17 | 6 | 8 | 16 | 3.95 |
| Away | 8 | 9.0 | 9 | 7 | 8 | 12 | 7.00 |
Last 10 Games — Pitching
| Date | Tm | Opp | Dec | IP | H | R | ER | BB | SO | HR |
|---|---|---|---|---|---|---|---|---|---|---|
| 2025-09-26 | LAD | SEA | — | 1.2 | 0 | 0 | 0 | 1 | 1 | 0 |
| 2025-09-25 | LAD | AZ | — | 1.0 | 1 | 0 | 0 | 0 | 2 | 0 |
| 2025-09-21 | LAD | SFG | — | 1.0 | 1 | 0 | 0 | 0 | 0 | 0 |
| 2025-09-20 | LAD | SFG | — | 1.0 | 0 | 0 | 0 | 0 | 3 | 0 |
| 2025-07-26 | LAD | BOS | — | 1.0 | 2 | 0 | 0 | 1 | 1 | 0 |
| 2025-07-22 | LAD | MIN | — | 0.1 | 0 | 3 | 1 | 3 | 1 | 0 |
| 2025-07-20 | LAD | MIL | — | 1.1 | 1 | 0 | 0 | 0 | 1 | 0 |
| 2025-07-18 | LAD | MIL | — | 0.2 | 2 | 0 | 0 | 0 | 1 | 0 |
| 2025-07-11 | LAD | SFG | — | 1.0 | 0 | 0 | 0 | 1 | 2 | 0 |
| 2025-07-07 | LAD | MIL | — | 1.0 | 2 | 2 | 2 | 2 | 1 | 0 |
Fielding Statistics
Career Games by Position
Circle size = games played at each position.
| Position | Games |
|---|---|
| Pitcher | 22 |
Will Klein: the record in brief
Active since a debut on April 28, 2024, Will Klein has a record on this page that is still being added to. Club by club, the record runs the Kansas City Royals (2024), the Oakland Athletics (2024), and the Los Angeles Dodgers (2025). Klein played primarily as a pitcher and both batted and threw right-handed. The bio adds a birth date on November 28, 1999, in Bloomington, IN, USA and a listed size of 6'5" and 230 pounds. The bio lists the given name William Boone.
Across 58 games (3 starts), Klein has recorded 5 wins against 5 losses with a 4.20 ERA. Also on Klein's record: 77 strikeouts. Klein's 4.20 ERA was close to the 4.14 league figure for those seasons. Among the heaviest workloads, the lowest ERA was 3.67 in 2026, when the league's was 4.18. Klein's career Pitcher PIV, which scores run prevention against each season's league, is 544.0.
The playoff pitching line reads 1-0, 0.00 ERA, across 2 appearances. Those appearances came in 2025.
The game-log section draws on 44 games of Retrosheet box scores for Klein.
Klein appears at one position only: pitcher, in 22 games. On the mound, Klein's fielding totals are 0 putouts, 5 assists and 0 errors.
Frequently Asked Questions about Will Klein
- What years did Will Klein play?
- Will Klein played in Major League Baseball from 2024 to 2026.
- Was Will Klein a pitcher?
- Yes. Will Klein pitched in the major leagues, recording 5 wins and 77 strikeouts.
- What was Will Klein's career ERA?
- Will Klein finished with a 4.20 career ERA, going 5-5 with 77 strikeouts.
- How many strikeouts did Will Klein have?
- Will Klein recorded 77 career strikeouts.
- Is Will Klein in the Hall of Fame?
- No. Will Klein has not been inducted into the National Baseball Hall of Fame.
- What teams did Will Klein play for?
- Will Klein played for the Kansas City Royals, the Athletics, the Los Angeles Dodgers, and the Los Angeles Dodgers.