Chicago Pirates Losses Leaders
Career totals with the Chicago Pirates and the best single seasons in club history. Records run through the 2025 season.
Mark Baldwin holds the Chicago Pirates career record with 24 losses. The single-season record is 24, by Mark Baldwin in 1890.
All-time Chicago Pirates leaders
Career totals with the club| # | Player | With the club | L | G |
|---|---|---|---|---|
| 1 |
 Mark Baldwin
|
1890 | 24 | 58 |
| 2 |
 Silver King
|
1890 | 22 | 56 |
| 3 | Charlie Bartson | 1890 | 10 | 26 |
| 4 |
 Frank Dwyer
|
1890 | 6 | 12 |
Single-season Chicago Pirates records
Best seasons in club history| # | Player | Season | L | G |
|---|---|---|---|---|
| 1 |
Mark Baldwin
|
1890 | 24 | 58 |
| 2 |
Silver King
|
1890 | 22 | 56 |
| 3 | Charlie Bartson | 1890 | 10 | 26 |
| 4 |
Frank Dwyer
|
1890 | 6 | 12 |