Career Leaders for Walks Allowed
Minimum of 3.1 PA/G, 1.0 IP/G, and 0.1 decision/G for career leaderboards for rate statistics.
| Rank | Player | Walks Allowed |
| 1. | Carlos Zambrano | 474 |
| 2. | Barry Zito | 445 |
| 3. | AJ Burnett | 384 |
| 4. | Tim Hudson | 372 |
| 5. | Freddy Garcia | 336 |
