Pittsburgh Keystones Earned Run Average Leaders
Career totals with the Pittsburgh Keystones and the best single seasons in club history. Records run through the 2025 season.
The single-season record is 5.27, by Bill McCall in 1922.
Rate records use the league's own minimums: a season needs the standard 1.0 inning per team game with the club, a career 1,000+ innings pitched with the club.
All-time Pittsburgh Keystones leaders
Career totals with the clubNo qualifying careers on record.
Single-season Pittsburgh Keystones records
Best seasons in club history| # | Player | Season | ERA | G |
|---|---|---|---|---|
| 1 |
 Bill McCall
|
1922 | 5.27 | 19 |
| 2 | Oscar Owens | 1922 | 5.77 | 7 |
| 3 |
 Charles Corbett
|
1922 | 6.05 | 16 |