Isaiah Campbell
Pitcher · Career Stats, Bio & Records (2023-2025)
Isaiah Campbell is a pitcher who has played in Major League Baseball since 2023 for the Seattle Mariners and the Boston Red Sox, a span of 3 seasons. Across 41 career appearances, he has gone 4-2 with a 5.65 ERA and 42 strikeouts. His career Pitcher PIV — Baseball Data Hub's era-adjusted measure of pitching impact — is 725.9.
- 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
- 6'4" / 230 lb
- MLB Debut
- 2023-07-07
- Jersey
- #49
Full name: Isaiah Lyn Campbell
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2023 | SEA | AL | 4 | 1 | 27 | 0 | 0 | 0 | 1 | 28.2 | 22 | 9 | 13 | 33 | 2.83 | 4.33 (+35%) | 725.9 |
| 2024 | BOS | AL | 0 | 1 | 8 | 0 | 0 | 0 | 0 | 6.2 | 14 | 12 | 2 | 6 | 16.20 | — | 0.0 |
| 2025 | BOS | AL | 0 | 0 | 6 | 0 | 0 | 0 | 0 | 7.2 | 13 | 6 | 1 | 3 | 7.04 | — | 0.0 |
| Career · 3 seasons | 4 | 2 | 41 | 0 | 0 | 0 | 1 | 43.0 | 49 | 27 | 16 | 42 | 5.65 | — | 726 | ||
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2023 | SEA | AL | 27 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | — | — | — | — | 0.0 |
| 2024 | BOS | AL | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | — | — | — | — | 0.0 |
| 2025 | BOS | AL | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | — | — | — | — | 0.0 |
| Career · 3 seasons | 41 | 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 (82 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 | 21 | 0 | 0 | 0 | 0 | 0 | — |
Pitching — Home / Away
| Split | G | IP | H | ER | BB | SO | ERA |
|---|---|---|---|---|---|---|---|
| Home | 20 | 20.1 | 31 | 20 | 8 | 20 | 8.85 |
| Away | 21 | 22.2 | 18 | 7 | 8 | 22 | 2.78 |
Last 10 Games — Pitching
| Date | Tm | Opp | Dec | IP | H | R | ER | BB | SO | HR |
|---|---|---|---|---|---|---|---|---|---|---|
| 2025-08-16 | BOS | MIA | — | 0.2 | 4 | 3 | 3 | 0 | 0 | 0 |
| 2025-08-11 | BOS | HOU | — | 1.0 | 1 | 0 | 0 | 0 | 0 | 0 |
| 2025-08-10 | BOS | SDP | — | 1.0 | 1 | 0 | 0 | 1 | 1 | 0 |
| 2025-08-08 | BOS | SDP | — | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2025-08-06 | BOS | KCR | — | 2.0 | 3 | 1 | 1 | 0 | 2 | 0 |
| 2025-07-09 | BOS | COL | — | 2.0 | 4 | 2 | 2 | 0 | 0 | 1 |
| 2024-06-24 | BOS | TOR | — | 0.1 | 3 | 3 | 3 | 0 | 1 | 1 |
| 2024-04-11 | BOS | BAL | L | 1.0 | 4 | 6 | 5 | 1 | 1 | 2 |
| 2024-04-10 | BOS | BAL | — | 1.0 | 4 | 3 | 3 | 0 | 0 | 0 |
| 2024-04-06 | BOS | LAA | — | 0.1 | 1 | 0 | 0 | 1 | 0 | 0 |
Fielding Statistics
Career Games by Position
Circle size = games played at each position.
| Position | Games |
|---|---|
| Pitcher | 41 |
Isaiah Campbell: the record in brief
Isaiah Campbell's major league record starts with the debut on July 7, 2023 and remains open, because the career is ongoing. By club, Campbell's seasons break down as the Seattle Mariners (2023) and the Boston Red Sox (2024 through 2025). Listed as a pitcher, Campbell threw and hit right-handed. Campbell is listed at 6-foot-4 and 230 pounds. The birth record reads August 15, 1997, in Angra do Heroismo, Azores, Portugal. The given name on file is Isaiah Lyn Campbell.
Campbell has gone 4-2 with a 5.65 ERA in 41 games, 0 of them starts. Campbell has 42 strikeouts. Against a 4.19 league ERA for the same seasons, the 5.65 mark was 34.9% worse. Among the heaviest workloads, the lowest ERA was 2.83 in 2023, when the league's was 4.33. Campbell's career Pitcher PIV, which scores run prevention against each season's league, is 725.9.
The game-log section draws on 82 games of Retrosheet box scores for Campbell.
Every defensive appearance on record for Campbell, 41 games, came at pitcher. On the mound, Campbell's fielding totals are 5 putouts, 4 assists and 1 errors.
Frequently Asked Questions about Isaiah Campbell
- What years did Isaiah Campbell play?
- Isaiah Campbell played in Major League Baseball from 2023 to 2025.
- Was Isaiah Campbell a pitcher?
- Yes. Isaiah Campbell pitched in the major leagues, recording 4 wins and 42 strikeouts.
- What teams has Isaiah Campbell played for?
- Isaiah Campbell has played for 2 teams: the Seattle Mariners (2023) and the Boston Red Sox (2024–2025).
- What are Isaiah Campbell's career stats?
- In 41 games, Isaiah Campbell has gone 4-2 with a 5.65 ERA, 42 strikeouts, 43.0 innings pitched, and 1 saves.
- What position does Isaiah Campbell play?
- Isaiah Campbell plays primarily as a pitcher, the position where he has appeared in the most games.
- How tall is Isaiah Campbell and how much does he weigh?
- Isaiah Campbell is listed at 6 feet 4 inches and 230 pounds.
- What number does Isaiah Campbell wear?
- Isaiah Campbell wears number 49, according to MLB's 2025 roster data.
- What was Isaiah Campbell's career ERA?
- Isaiah Campbell finished with a 5.65 career ERA, going 4-2 with 42 strikeouts.
- How many strikeouts did Isaiah Campbell have?
- Isaiah Campbell recorded 42 career strikeouts.