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| Name | Given Name | Age | Birthday | Height | Weight | Birth City | Birth Country | Batting Hand | Throwing Hand |
|---|---|---|---|---|---|---|---|---|---|
| John Halama | John Thadeuz | 54 | 02/22/1972 | 6'5" | 215 lbs | Brooklyn | L | L |
| Year | Team | Games | At Bats | Hits | Home Runs | RBI | Batting AVG | Wins | Losses | Strikeouts | Shutouts | Position | Errors | Double Plays | Assists |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1998 | Houston Astros | 6 | 10 | 0 | 0 | 0 | 0.0000 | 1 | 1 | 21 | 0 | Pitcher | 0 | 0 | 5 |
| 1999 | Seattle Mariners | 38 | 5 | 1 | 0 | 0 | 0.2000 | 11 | 10 | 105 | 1 | Pitcher | 2 | 5 | 32 |
| 2000 | Seattle Mariners | 30 | 2 | 1 | 0 | 0 | 0.5000 | 14 | 9 | 87 | 1 | Pitcher | 3 | 3 | 27 |
| 2001 | Seattle Mariners | 31 | 1 | 0 | 0 | 0 | 0.0000 | 10 | 7 | 50 | 0 | Pitcher | 1 | 0 | 21 |
| 2002 | Seattle Mariners | 31 | 0 | 0 | 0 | 0 | 6 | 5 | 70 | 0 | Pitcher | 2 | 1 | 20 | |
| 2003 | Oakland Athletics | 35 | 0 | 0 | 0 | 0 | 3 | 5 | 51 | 0 | Pitcher | 1 | 1 | 19 | |
| 2004 | Tampa Bay Devil Rays | 34 | 3 | 0 | 0 | 0 | 0.0000 | 7 | 6 | 59 | 0 | Pitcher | 0 | 0 | 14 |
| 2005 | Boston Red Sox | 30 | 0 | 0 | 0 | 0 | 1 | 1 | 26 | 0 | Pitcher | 1 | 1 | 7 | |
| 2005 | Washington Nationals | 10 | 5 | 1 | 0 | 0 | 0.2000 | 0 | 3 | 11 | 0 | Pitcher | 0 | 0 | 4 |
| 2006 | Baltimore Orioles | 17 | 0 | 0 | 0 | 0 | 3 | 1 | 12 | 0 | Pitcher | 1 | 0 | 9 |