Regular-season careers from the StatVault encyclopedia — the same tables as each player's profile.
| Antonio Alfonseca | Stat | Grant Balfour |
|---|---|---|
| 11 | Seasons | 12 |
| 14.3 | Career VAL | 14.7 |
| 4.0 (1999) | Peak-season VAL | 3.8 (2008) |
| — | All-Star Selections | 1× |
| 1 | Black ink (league-leading seasons) | 0 |
| 1 | Gray ink (top-10 finishes) | 1 |
VAL is Value Above League — regular-season production measured against the league at the same position group (MLB VAL board). Black and gray ink count seasons from 1950 on.
| Antonio Alfonseca | Stat | Grant Balfour |
|---|---|---|
| Career | ||
| 592 | Games | 534 |
| Batting | ||
| 2 | Hits | 0 |
| 2 | RBI | 0 |
| .143 | Batting avg | .000 |
| .143 | On-base % | .000 |
| .143 | Slugging % | .000 |
| -22 | ||
| OPS+ |
|---|
| -100 |
| Pitching | ||
|---|---|---|
| 35 | Wins | 30 |
| 37 | Losses | 23 |
| 129 | Saves | 84 |
| 613.0 | Innings pitched | 539.2 |
| 400 | Strikeouts (pitching) | 571 |
| 4.11 | ERA | 3.49 |
| 1.51 | WHIP | 1.22 |
| 106 | ERA+ | 116 |
| Age | Antonio Alfonseca | Grant Balfour |
|---|---|---|
| 26 | 0.6 | 0.6 |
| 27 | 4 | — |
| 28 | 2.2 | — |
| 29 | 2.3 | — |
| 30 | 1.6 | 3.8 |
| 31 | 0.1 | 0.8 |
| 32 | 3.5 | 3 |
| 33 | — | 1.9 |
| 34 | — | 3.4 |
| 35 | 0 | 1.2 |
| 36 | — | 0 |