Sean Guenther
Pitcher · Career Stats, Bio & Records (2021-2025)
Sean Guenther is a pitcher who has played in Major League Baseball since 2021 for the Miami Marlins and the Detroit Tigers, a span of 5 seasons. Across 40 career appearances, he has gone 3-2 with a 5.05 ERA and 35 strikeouts. His career Pitcher PIV — Baseball Data Hub's era-adjusted measure of pitching impact — is 1154.2.
- 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
- L / L
- Height / Weight
- 5'11" / 194 lb
- MLB Debut
- 2021-08-04
- Jersey
- #73
Full name: Sean McManus Guenther
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021 | MIA | NL | 0 | 1 | 14 | 0 | 0 | 0 | 0 | 20.1 | 31 | 21 | 10 | 15 | 9.30 | 4.27 (-118%) | 82.2 |
| 2024 | DET | AL | 3 | 0 | 17 | 0 | 0 | 0 | 0 | 21.0 | 9 | 2 | 2 | 12 | 0.86 | 4.08 (+79%) | 782.0 |
| 2025 | DET | AL | 0 | 1 | 9 | 1 | 0 | 0 | 0 | 10.1 | 10 | 6 | 5 | 8 | 5.23 | 4.16 (-26%) | 290.0 |
| Career · 3 seasons | 3 | 2 | 40 | 1 | 0 | 0 | 0 | 51.2 | 50 | 29 | 17 | 35 | 5.05 | — | 1,154 | ||
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021 | MIA | NL | 14 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | — | — | — | — | 0.0 |
| 2024 | DET | AL | 17 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | — | — | — | — | 0.0 |
| 2025 | DET | AL | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | — | — | — | — | 0.0 |
| Career · 3 seasons | 40 | 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 (80 games) →Per-game data from Retrosheet (regular season, through 2025).
Batting — Home / Away
| Split | G | AB | R | H | HR | RBI | AVG |
|---|---|---|---|---|---|---|---|
| Home | 20 | 0 | 0 | 0 | 0 | 0 | — |
| Away | 20 | 0 | 0 | 0 | 0 | 0 | — |
Pitching — Home / Away
| Split | G | IP | H | ER | BB | SO | ERA |
|---|---|---|---|---|---|---|---|
| Home | 20 | 27.0 | 22 | 10 | 8 | 22 | 3.33 |
| Away | 20 | 24.2 | 28 | 19 | 9 | 13 | 6.93 |
Last 10 Games — Pitching
| Date | Tm | Opp | Dec | IP | H | R | ER | BB | SO | HR |
|---|---|---|---|---|---|---|---|---|---|---|
| 2025-05-22 | DET | CLE | — | 1.1 | 1 | 3 | 2 | 2 | 1 | 0 |
| 2025-05-21 | DET | STL | — | 0.2 | 1 | 1 | 1 | 0 | 1 | 0 |
| 2025-05-19 | DET | STL | L | 0.1 | 3 | 1 | 1 | 0 | 0 | 0 |
| 2025-05-12 | DET | BOS | — | 2.0 | 1 | 0 | 0 | 0 | 1 | 0 |
| 2025-05-10 | DET | TEX | — | 1.1 | 1 | 2 | 2 | 2 | 0 | 0 |
| 2025-05-08 | DET | COL | — | 1.0 | 0 | 0 | 0 | 1 | 1 | 0 |
| 2025-05-03 | DET | LAA | — | 1.0 | 1 | 0 | 0 | 0 | 0 | 0 |
| 2025-04-27 | DET | BAL | — | 2.0 | 1 | 0 | 0 | 0 | 3 | 0 |
| 2025-04-26 | DET | BAL | — | 0.2 | 1 | 0 | 0 | 0 | 1 | 0 |
| 2024-09-28 | DET | CHW | — | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 |
Fielding Statistics
Career Games by Position
Circle size = games played at each position.
| Position | Games |
|---|---|
| Pitcher | 40 |
Sean Guenther: the record in brief
Sean Guenther's major league record starts with the debut on August 4, 2021 and remains open, because the career is ongoing. Guenther played for the Miami Marlins (2021) and the Detroit Tigers (2024 through 2025). Guenther played primarily as a pitcher and both batted and threw left-handed. Born on December 29, 1995, in Atlanta, GA, USA, Guenther was listed at 194 pounds on a 5-foot-11 frame. On the record, Sean Guenther was born Sean McManus Guenther.
Guenther has gone 3-2 with a 5.05 ERA in 40 games, 1 of them starts. Guenther has 35 strikeouts. The league ERA over Guenther's seasons was 4.17, so the 5.05 figure ran 21.2% worse than average. 2024 was Guenther's sharpest full season, a 0.86 ERA against the league's 4.08. By Pitcher PIV, Baseball Data Hub's measure of run prevention relative to each season's league, Guenther's career adds up to 1,154.2.
Retrosheet box scores cover 80 of Guenther's games, and the full game log is linked from the splits section.
Pitching in the playoffs, Guenther went 1-0 with a 3.00 ERA in 4 games. Those appearances came in 2024.
Every defensive appearance on record for Guenther, 40 games, came at pitcher. Fielding on the mound produced 3 putouts and 4 assists against 0 errors.
Frequently Asked Questions about Sean Guenther
- What years did Sean Guenther play?
- Sean Guenther played in Major League Baseball from 2021 to 2025.
- Was Sean Guenther a pitcher?
- Yes. Sean Guenther pitched in the major leagues, recording 3 wins and 35 strikeouts.
- What teams has Sean Guenther played for?
- Sean Guenther has played for 2 teams: the Miami Marlins (2021) and the Detroit Tigers (2024–2025).
- What are Sean Guenther's career stats?
- In 40 games, Sean Guenther has gone 3-2 with a 5.05 ERA, 35 strikeouts, and 51.2 innings pitched.
- What position does Sean Guenther play?
- Sean Guenther plays primarily as a pitcher, the position where he has appeared in the most games.
- How tall is Sean Guenther and how much does he weigh?
- Sean Guenther is listed at 5 feet 11 inches and 194 pounds.
- What number does Sean Guenther wear?
- Sean Guenther wears number 73, according to MLB's 2025 roster data.
- What was Sean Guenther's career ERA?
- Sean Guenther finished with a 5.05 career ERA, going 3-2 with 35 strikeouts.
- How many strikeouts did Sean Guenther have?
- Sean Guenther recorded 35 career strikeouts.