John Klein
Career Stats, Bio & Records (2026)
John Klein is a pitcher who has played in Major League Baseball since 2026 for the Toronto Blue Jays. Across 4 career appearances, he has gone 0-1 with a 2.16 ERA and 7 strikeouts.
- 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
- Bats / Throws
- R / R
- Height / Weight
- 6'5" / 225 lb
- MLB Debut
- 2026-05-02
- Jersey
- #65
- Draft
- 2022
Full name: John Klein 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | TOR | AL | 0 | 1 | 4 | 0 | 0 | 0 | 0 | 8.1 | 5 | 2 | 6 | 7 | 2.16 | — | - |
| Career · 1 season | 0 | 1 | 4 | 0 | 0 | 0 | 0 | 8.1 | 5 | 2 | 6 | 7 | 2.16 | — | 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.
John Klein: the record in brief
John Klein's major league record starts with the debut on May 2, 2026 and remains open, because the career is ongoing. Klein spent the whole of the career shown here with one club, the Toronto Blue Jays. Height and weight on file: 225 pounds on a 6-foot-5 frame. The birth record reads April 22, 2002, in Brooklyn Park, MN, USA.
Across 4 games (0 starts), Klein has recorded 0 wins against 1 loss with a 2.16 ERA. Klein has 7 strikeouts. That 2.16 ERA compares with a 4.18 league average across the same seasons, 48.3% better. All of that pitching came in 2026, with 4 games and 7 strikeouts.
The draft line shows 2022.
Frequently Asked Questions about John Klein
- Was John Klein a pitcher?
- Yes. John Klein pitched in the major leagues, recording 0 wins and 7 strikeouts.
- What teams has John Klein played for?
- John Klein has played for one team, the Toronto Blue Jays (2026).
- What are John Klein's career stats?
- In 4 games, John Klein has gone 0-1 with a 2.16 ERA, 7 strikeouts, and 8.1 innings pitched.
- How tall is John Klein and how much does he weigh?
- John Klein is listed at 6 feet 5 inches and 225 pounds.
- What number does John Klein wear?
- John Klein wears number 65, according to MLB's 2026 roster data.
- What was John Klein's career ERA?
- John Klein finished with a 2.16 career ERA, going 0-1 with 7 strikeouts.
- How many strikeouts did John Klein have?
- John Klein recorded 7 career strikeouts.