Derek Lowe ERA in 2003
4.472003 Regular Season
Derek Lowe posted a 4.47 ERA in the 2003 regular season.
| ERA: Earned runs allowed per nine innings pitched — lower is better. Under 3.00 is excellent. | IP: Innings pitched. The decimal counts outs, so 6.2 is six innings and two more outs. | H: Times the batter reached base by hitting the ball, without help from an error. | R: Runs — scored by the batter, or allowed by the pitcher. | ER: Earned runs allowed — runs that scored without help from an error. | BB: Times the batter reached first base on four balls. | K: Batters this pitcher struck out. | HR: Home runs hit. | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Sep 25, 2003 |  vs BAL | W 14-3 | 4.47 | 6.0 | 2 | 2 | 1 | 4 | 1 | 0 |
| Sep 20, 2003 |  @ CLE | L 13-4 | 4.56 | 6.1 | 9 | 6 | 4 | 0 | 3 | 2 |
| Sep 15, 2003 |  vs TB | W 8-2 | 4.52 | 8.0 | 4 | 2 | 2 | 2 | 6 | 1 |
| Sep 9, 2003 | @ BAL | W 9-2 | 4.62 | 6.0 | 6 | 1 | 1 | 2 | 5 | 0 |
| Sep 3, 2003 |  @ CHW | W 5-4 F/10 | 4.73 | 7.0 | 10 | 3 | 3 | 4 | 3 | 0 |
| Aug 29, 2003 |  vs NYY | W 10-5 | 4.76 | 6.0 | 5 | 5 | 5 | 3 | 1 | 0 |
| Aug 24, 2003 |  vs SEA | W 6-1 | 4.66 | 7.1 | 5 | 1 | 1 | 5 | 4 | 0 |
| Aug 19, 2003 |  vs ATH | L 3-2 | 4.83 | 6.0 | 2 | 0 | 0 | 0 | 3 | 0 |
| Aug 13, 2003 | @ ATH | W 7-3 | 5.02 | 5.0 | 5 | 2 | 2 | 2 | 3 | 0 |
| Aug 8, 2003 | vs BAL | L 10-4 | 5.07 | 6.0 | 8 | 6 | 5 | 1 | 3 | 0 |
| Aug 2, 2003 | @ BAL | L 11-2 | 4.96 | 5.2 | 8 | 6 | 5 | 3 | 4 | 0 |
| Jul 27, 2003 | vs NYY | W 6-4 | 4.84 | 6.0 | 9 | 3 | 3 | 3 | 3 | 1 |
| Jul 22, 2003 |  vs DET | W 7-4 | 4.85 | 8.0 | 6 | 3 | 3 | 0 | 4 | 2 |
| Jul 17, 2003 |  vs TOR | L 5-2 | 4.95 | 4.0 | 7 | 4 | 4 | 1 | 4 | 0 |
| Jul 9, 2003 | @ TOR | W 8-7 | 4.81 | 6.0 | 11 | 7 | 7 | 2 | 3 | 1 |
| Jul 4, 2003 | @ NYY | W 10-3 | 4.50 | 6.1 | 10 | 3 | 3 | 1 | 2 | 2 |
| Jun 29, 2003 |  vs MIA | W 11-7 | 4.51 | 7.0 | 5 | 6 | 6 | 2 | 7 | 1 |
| Jun 24, 2003 | vs DET | W 10-1 | 4.28 | 8.0 | 7 | 1 | 1 | 2 | 4 | 0 |
| Jun 19, 2003 | @ CHW | W 4-3 F/10 | 4.57 | 6.0 | 7 | 3 | 2 | 3 | 2 | 0 |
| Jun 14, 2003 |  vs HOU | W 8-4 | 4.68 | 7.1 | 9 | 4 | 4 | 1 | 1 | 2 |
| Jun 8, 2003 |  @ MIL | W 9-1 | 4.66 | 6.0 | 5 | 1 | 1 | 1 | 5 | 0 |
| Jun 4, 2003 |  @ PIT | W 8-3 | 4.93 | 7.0 | 5 | 2 | 1 | 3 | 1 | 0 |
| May 28, 2003 | @ NYY | L 6-5 | 5.34 | 6.0 | 8 | 4 | 4 | 2 | 3 | 0 |
| May 23, 2003 | vs CLE | W 9-2 | 5.27 | 9.0 | 4 | 2 | 2 | 3 | 5 | 0 |
| May 17, 2003 |  vs LAA | L 6-2 | 5.89 | 7.1 | 7 | 2 | 2 | 3 | 3 | 0 |
| May 11, 2003 |  @ MIN | L 9-8 | 6.53 | 4.0 | 10 | 8 | 6 | 0 | 3 | 0 |
| May 5, 2003 |  @ KC | L 7-6 | 5.75 | 3.2 | 7 | 5 | 4 | 3 | 3 | 2 |
| Apr 30, 2003 | vs KC | W 5-4 | 5.29 | 7.0 | 2 | 2 | 2 | 3 | 2 | 0 |
| Apr 24, 2003 |  @ TEX | L 16-5 | 6.04 | 2.0 | 6 | 7 | 7 | 3 | 2 | 1 |
| Apr 19, 2003 | vs TOR | W 7-2 | 3.86 | 5.0 | 7 | 2 | 0 | 3 | 5 | 0 |
| Apr 13, 2003 | vs BAL | W 2-0 | 4.91 | 7.0 | 5 | 0 | 0 | 1 | 3 | 0 |
| Apr 8, 2003 | @ TOR | L 8-4 | 7.94 | 5.1 | 9 | 5 | 5 | 4 | 6 | 1 |
| Apr 2, 2003 | @ TB | W 7-5 | 7.50 | 6.0 | 6 | 5 | 5 | 2 | 3 | 1 |
- 11th-best of Derek Lowe's 17 seasons on file; the best is 2.56 in 2000.
- Up 1.89 from 2.58 in 2002.
Figures come from ESPN's box scores and were last read on October 29, 2026.