Antonio Alfonseca played in Major League Baseball from 1997 to 2007, appearing in 592 games over 11 seasons. He recorded a total of 35 W and 37 L, an ERA of 4.11, 400 SO, a WHIP of 1.512, and a WAR of 3.7.
Antonio Alfonseca Yearly Pitching Stats
This chart shows the season-by-season changes in ERA, SO, and IP for Antonio Alfonseca.
🧾 Basic Profile
 | |
| Name | Antonio Alfonseca |
| Date of Birth | April 16, 1972 |
| Nationality |  Dominican Republic |
| MLB Debut | 1997 |
📊 Career Summary
Antonio Alfonseca appeared in 592 games over 11 MLB seasons from 1997 to 2007. Below are his cumulative stats and MLB all-time rankings:
| GS | 0 (MLB Rank: 7,909) |
| GF | 301 (MLB Rank: 115) |
| W | 35 (MLB Rank: 1,997) |
| L | 37 (MLB Rank: 2,050) |
| SV | 129 (MLB Rank: 117) |
| ERA | 4.11 (MLB Rank: 4,570) |
| IP | 613 (MLB Rank: 2,137) |
| SO | 400 (MLB Rank: 1,947) |
| BB | 250 (MLB Rank: 1,952) |
| H | 677 (MLB Rank: 1,938) |
| HR | 55 (MLB Rank: 1,851) |
| SO9 | 5.87 (MLB Rank: 4,138) |
| BB9 | 3.67 (MLB Rank: 6,093) |
| H9 | 9.94 (MLB Rank: 4,609) |
| HR9 | 0.81 (MLB Rank: 5,314) |
| WHIP | 1.512 (MLB Rank: 5,274) |
| WAR | 3.7 (MLB Rank: 2,460) |
📊 Last Season Summary (2007)
In his final season (2007), Antonio Alfonseca recorded the following stats:
| GS | 0 |
| GF | 22 |
| W | 5 |
| L | 2 |
| SV | 8 |
| ERA | 5.44 |
| IP | 49.2 |
| SO | 24 |
| BB | 27 |
| H | 65 |
| HR | 3 |
| SO9 | 4.35 |
| BB9 | 4.89 |
| H9 | 11.78 |
| HR9 | 0.54 |
| WHIP | 1.852 |
| WAR | −0.6 |
📈 Seasonal Highlights
- Most Wins: 2004, 6 W
- Most SO: 2002, 61 SO
- Most IP: 1999, 77.2 IP
- Best WAR: 1999, 1.5 WAR
- Best ERA: 2004, 2.58 ERA
🎯 Postseason Performance
Antonio Alfonseca appeared in 12 games during the postseason. He recorded an ERA of 1.34, pitched 13.4 IP, struck out 5 batters, with 1 W and 0 L.
Antonio Alfonseca Career Pitching Stats Overview
| season | W | L | ERA | W-L% | SV | SO | IP | WAR | WHIP | HR | H | BB | R | ER | ERA+ | FIP | SO9 | SO/BB | GS | G | GF | CG | SHO | HR9 | H9 | BB9 | BK | HBP | IBB | WP | BF |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1997 | 1 | 3 | 4.91 | 0.25 | 0 | 19 | 25.2 | -0.3 | 1.792 | 3 | 36 | 10 | 16 | 14 | 83 | 4.43 | 6.7 | 1.9 | 0 | 17 | 2 | 0 | 0 | 1.1 | 12.6 | 3.5 | 0 | 1 | 3 | 1 | 123 |
1998 | 4 | 6 | 4.08 | 0.4 | 8 | 46 | 70.2 | 0.1 | 1.528 | 10 | 75 | 33 | 36 | 32 | 99 | 5.21 | 5.9 | 1.39 | 0 | 58 | 27 | 0 | 0 | 1.3 | 9.6 | 4.2 | 0 | 3 | 9 | 1 | 316 |
1999 | 4 | 5 | 3.24 | 0.444 | 21 | 46 | 77.2 | 1.5 | 1.391 | 4 | 79 | 29 | 28 | 28 | 133 | 3.89 | 5.3 | 1.59 | 0 | 73 | 49 | 0 | 0 | 0.5 | 9.2 | 3.4 | 0 | 4 | 6 | 1 | 325 |
2000 | 5 | 6 | 4.24 | 0.455 | 45 | 47 | 70 | 0.5 | 1.514 | 7 | 82 | 24 | 35 | 33 | 104 | 4.16 | 6 | 1.96 | 0 | 68 | 62 | 0 | 0 | 0.9 | 10.5 | 3.1 | 2 | 1 | 3 | 0 | 311 |
2001 | 4 | 4 | 3.06 | 0.5 | 28 | 40 | 61.2 | 0.9 | 1.346 | 6 | 68 | 15 | 24 | 21 | 139 | 3.99 | 5.8 | 2.67 | 0 | 58 | 52 | 0 | 0 | 0.9 | 9.9 | 2.2 | 0 | 5 | 3 | 2 | 268 |
2002 | 2 | 5 | 4 | 0.286 | 19 | 61 | 74.1 | 0.8 | 1.466 | 5 | 73 | 36 | 34 | 33 | 101 | 3.77 | 7.4 | 1.69 | 0 | 66 | 55 | 0 | 0 | 0.6 | 8.8 | 4.4 | 0 | 3 | 3 | 1 | 330 |
2003 | 3 | 1 | 5.83 | 0.75 | 0 | 51 | 66.1 | -0.5 | 1.553 | 7 | 76 | 27 | 43 | 43 | 75 | 4.18 | 6.9 | 1.89 | 0 | 60 | 17 | 0 | 0 | 0.9 | 10.3 | 3.7 | 0 | 2 | 3 | 0 | 296 |
2004 | 6 | 4 | 2.57 | 0.6 | 0 | 45 | 73.2 | 1.4 | 1.344 | 5 | 71 | 28 | 24 | 21 | 167 | 3.85 | 5.5 | 1.61 | 0 | 79 | 11 | 0 | 0 | 0.6 | 8.7 | 3.4 | 0 | 0 | 5 | 5 | 313 |
2005 | 1 | 1 | 4.94 | 0.5 | 0 | 16 | 27.1 | 0 | 1.573 | 2 | 29 | 14 | 15 | 15 | 82 | 4.56 | 5.3 | 1.14 | 0 | 33 | 1 | 0 | 0 | 0.7 | 9.5 | 4.6 | 0 | 2 | 4 | 1 | 118 |
2006 | 0 | 0 | 5.63 | 0 | 0 | 5 | 16 | -0.1 | 1.875 | 3 | 23 | 7 | 10 | 10 | 84 | 6.27 | 2.8 | 0.71 | 0 | 19 | 3 | 0 | 0 | 1.7 | 12.9 | 3.9 | 0 | 0 | 0 | 0 | 74 |
2007 | 5 | 2 | 5.44 | 0.714 | 8 | 24 | 49.2 | -0.6 | 1.852 | 3 | 65 | 27 | 31 | 30 | 85 | 4.75 | 4.3 | 0.89 | 0 | 61 | 22 | 0 | 0 | 0.5 | 11.8 | 4.9 | 0 | 1 | 6 | 1 | 236 |