Since 2010, Brian Matusz has the worst ERA by a starting pitcher when pitching at least 300 innings, with an ERA of 5.75.
| NAME | ERA | IP | G | W | L | W% | GS | SO | CG | SHO | SV | H | ER | R | HR | BB | HBP | GF | IBB | TBF | WP | K/9 | BB/9 | K/BB | HR/9 | K% | BB% | WHIP | BABIP | RA | H/9 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | B. Matusz | 5.75 | 313.0 | 61 | 16 | 31 | .340 | 61 | 245 | 0 | 0 | 0 | 367 | 200 | 213 | 54 | 127 | 8 | 0 | 7 | 1,417 | 2 | 7.04 | 3.65 | 1.93 | 1.55 | 17.3 | 9.0 | 1.58 | .318 | 6.12 | 10.55 |
| 2 | | T. Blach | 5.62 | 370.0 | 70 | 19 | 31 | .380 | 70 | 203 | 1 | 1 | 0 | 454 | 231 | 240 | 57 | 112 | 11 | 0 | 2 | 1,626 | 6 | 4.94 | 2.72 | 1.81 | 1.39 | 12.5 | 6.9 | 1.53 | .319 | 5.84 | 11.04 |
| 3 | | H. Noesi | 5.54 | 313.1 | 57 | 10 | 31 | .244 | 57 | 219 | 1 | 0 | 0 | 321 | 193 | 203 | 61 | 120 | 7 | 0 | 3 | 1,350 | 15 | 6.29 | 3.45 | 1.83 | 1.75 | 16.2 | 8.9 | 1.41 | .276 | 5.83 | 9.22 |
| 4 | | N. Blackburn | 5.51 | 405.0 | 71 | 21 | 30 | .412 | 71 | 184 | 2 | 0 | 0 | 514 | 248 | 269 | 66 | 120 | 9 | 0 | 6 | 1,803 | 10 | 4.09 | 2.67 | 1.53 | 1.47 | 10.2 | 6.7 | 1.57 | .315 | 5.98 | 11.42 |
| 5 | | A. Cook | 5.47 | 317.2 | 58 | 13 | 29 | .310 | 58 | 128 | 3 | 1 | 0 | 387 | 193 | 209 | 34 | 110 | 10 | 0 | 10 | 1,417 | 8 | 3.63 | 3.12 | 1.16 | 0.96 | 9.0 | 7.8 | 1.56 | .311 | 5.92 | 10.96 |
| 6 | | R. Feltner | 5.45 | 444.0 | 89 | 14 | 35 | .286 | 89 | 366 | 0 | 0 | 0 | 471 | 269 | 292 | 65 | 177 | 16 | 0 | 0 | 1,956 | 10 | 7.42 | 3.59 | 2.07 | 1.32 | 18.7 | 9.0 | 1.46 | .305 | 5.92 | 9.55 |
| 7 |  | P. Lambert | 5.41 | 316.0 | 64 | 13 | 25 | .342 | 64 | 261 | 0 | 0 | 0 | 341 | 190 | 195 | 48 | 114 | 24 | 0 | 3 | 1,402 | 15 | 7.43 | 3.25 | 2.29 | 1.37 | 18.6 | 8.1 | 1.44 | .307 | 5.55 | 9.71 |
| 8 | | D. Lynch IV | 5.37 | 310.1 | 66 | 13 | 27 | .325 | 66 | 250 | 0 | 0 | 0 | 344 | 185 | 196 | 52 | 123 | 15 | 0 | 2 | 1,391 | 13 | 7.25 | 3.57 | 2.03 | 1.51 | 18.0 | 8.8 | 1.50 | .307 | 5.68 | 9.98 |
| 9 | | A. Senzatela | 5.29 | 759.0 | 145 | 41 | 58 | .414 | 145 | 480 | 1 | 0 | 0 | 919 | 446 | 474 | 100 | 241 | 33 | 0 | 10 | 3,352 | 15 | 5.69 | 2.86 | 1.99 | 1.19 | 14.3 | 7.2 | 1.53 | .328 | 5.62 | 10.90 |
| 10 | | J. Lyles | 5.27 | 1344.0 | 245 | 67 | 101 | .399 | 245 | 1,021 | 5 | 1 | 0 | 1,461 | 787 | 856 | 217 | 435 | 57 | 0 | 10 | 5,867 | 53 | 6.84 | 2.91 | 2.35 | 1.45 | 17.4 | 7.4 | 1.41 | .301 | 5.73 | 9.78 |
| 11 | | J. Francis | 5.20 | 460.1 | 87 | 19 | 35 | .352 | 87 | 286 | 1 | 0 | 0 | 556 | 266 | 279 | 57 | 103 | 16 | 0 | 15 | 2,013 | 10 | 5.59 | 2.01 | 2.78 | 1.11 | 14.2 | 5.1 | 1.43 | .322 | 5.45 | 10.87 |
| 12 | | C. Volstad | 5.14 | 467.1 | 83 | 20 | 37 | .351 | 83 | 288 | 2 | 1 | 0 | 523 | 267 | 281 | 59 | 157 | 13 | 0 | 15 | 2,047 | 12 | 5.55 | 3.02 | 1.83 | 1.14 | 14.1 | 7.7 | 1.46 | .303 | 5.41 | 10.07 |
| 13 | | D. Matsuzaka | 5.13 | 321.0 | 59 | 18 | 21 | .462 | 59 | 272 | 0 | 0 | 0 | 294 | 183 | 192 | 34 | 157 | 21 | 0 | 3 | 1,406 | 9 | 7.63 | 4.40 | 1.73 | 0.95 | 19.3 | 11.2 | 1.40 | .282 | 5.38 | 8.24 |
| 14 | | A. Gomber | 5.11 | 637.1 | 124 | 34 | 46 | .425 | 124 | 488 | 0 | 0 | 0 | 702 | 362 | 380 | 110 | 192 | 13 | 0 | 7 | 2,753 | 19 | 6.89 | 2.71 | 2.54 | 1.55 | 17.7 | 7.0 | 1.40 | .304 | 5.37 | 9.91 |
| 15 | | J. Nicasio | 5.11 | 424.2 | 82 | 25 | 26 | .490 | 82 | 341 | 0 | 0 | 0 | 469 | 241 | 258 | 58 | 155 | 10 | 0 | 13 | 1,868 | 15 | 7.23 | 3.28 | 2.20 | 1.23 | 18.3 | 8.3 | 1.47 | .315 | 5.47 | 9.94 |
| 16 | | M. Parker | 5.09 | 309.1 | 59 | 15 | 26 | .366 | 59 | 234 | 0 | 0 | 0 | 329 | 175 | 197 | 43 | 100 | 6 | 0 | 0 | 1,348 | 9 | 6.81 | 2.91 | 2.34 | 1.25 | 17.4 | 7.4 | 1.39 | .296 | 5.73 | 9.57 |
| 17 | | L. Hochevar | 5.08 | 483.1 | 80 | 25 | 33 | .431 | 80 | 345 | 3 | 1 | 0 | 499 | 273 | 295 | 58 | 159 | 23 | 0 | 8 | 2,069 | 17 | 6.42 | 2.96 | 2.17 | 1.08 | 16.7 | 7.7 | 1.36 | .297 | 5.49 | 9.29 |
| 18 | | JT Brubaker | 5.07 | 315.2 | 63 | 9 | 28 | .243 | 63 | 322 | 0 | 0 | 0 | 330 | 178 | 190 | 51 | 109 | 20 | 0 | 1 | 1,391 | 15 | 9.18 | 3.11 | 2.95 | 1.45 | 23.1 | 7.8 | 1.39 | .314 | 5.42 | 9.41 |
| 19 | | L. Perdomo | 5.05 | 327.2 | 61 | 17 | 26 | .395 | 61 | 236 | 1 | 0 | 0 | 383 | 184 | 204 | 39 | 117 | 17 | 0 | 9 | 1,451 | 22 | 6.48 | 3.21 | 2.02 | 1.07 | 16.3 | 8.1 | 1.53 | .330 | 5.60 | 10.52 |
| 20 | | L. Weaver | 5.05 | 520.0 | 106 | 25 | 42 | .373 | 106 | 521 | 0 | 0 | 0 | 566 | 292 | 310 | 86 | 164 | 12 | 0 | 7 | 2,274 | 7 | 9.02 | 2.84 | 3.18 | 1.49 | 22.9 | 7.2 | 1.40 | .322 | 5.37 | 9.80 |
| 21 | | Z. Godley | 5.02 | 475.0 | 89 | 32 | 34 | .485 | 89 | 464 | 0 | 0 | 0 | 477 | 265 | 280 | 58 | 205 | 29 | 0 | 8 | 2,085 | 44 | 8.79 | 3.88 | 2.26 | 1.10 | 22.3 | 9.8 | 1.44 | .315 | 5.31 | 9.04 |
| 22 | | J. Irvin | 5.01 | 585.1 | 110 | 24 | 43 | .358 | 110 | 477 | 0 | 0 | 0 | 577 | 326 | 345 | 103 | 210 | 27 | 0 | 1 | 2,512 | 14 | 7.33 | 3.23 | 2.27 | 1.58 | 19.0 | 8.4 | 1.34 | .280 | 5.30 | 8.87 |
| 23 | | J. Marquis | 5.01 | 483.1 | 87 | 30 | 35 | .462 | 87 | 307 | 2 | 2 | 0 | 551 | 269 | 305 | 71 | 191 | 22 | 0 | 8 | 2,158 | 13 | 5.72 | 3.56 | 1.61 | 1.32 | 14.2 | 8.9 | 1.54 | .306 | 5.68 | 10.26 |
| 24 | | M. Liberatore | 5.01 | 408.0 | 84 | 19 | 35 | .352 | 84 | 356 | 0 | 0 | 0 | 449 | 227 | 247 | 60 | 141 | 15 | 0 | 0 | 1,783 | 22 | 7.85 | 3.11 | 2.52 | 1.32 | 20.0 | 7.9 | 1.45 | .321 | 5.45 | 9.90 |
| 25 | | C. Smith | 5.00 | 307.2 | 64 | 16 | 26 | .381 | 64 | 341 | 0 | 0 | 0 | 258 | 171 | 178 | 63 | 152 | 12 | 0 | 6 | 1,332 | 7 | 9.98 | 4.45 | 2.24 | 1.84 | 25.6 | 11.4 | 1.33 | .255 | 5.21 | 7.55 |
StatMuse has game-level data for ERA and innings pitched going back to the 1901 season.
Some of the information used here was obtained free of charge from Retrosheet.
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| NL East | W | L | PCT | GB |
|---|---|---|---|---|
 Braves - y | 94 | 68 | .580 | |
 Phillies - w | 88 | 74 | .543 | 6.0 |
80 | 82 | .494 | 14.0 | |
77 | 85 | .475 | 17.0 | |
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| NL Central | W | L | PCT | GB |
 Brewers - y | 103 | 59 | .636 | |
 Cubs - w | 89 | 73 | .549 | 14.0 |
82 | 80 | .506 | 21.0 | |
77 | 85 | .475 | 26.0 | |
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| NL West | W | L | PCT | GB |
 Dodgers - y | 100 | 62 | .617 | |
 Padres - w | 91 | 71 | .562 | 9.0 |
86 | 76 | .531 | 14.0 | |
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|---|---|---|---|---|
 Rays - y | 98 | 64 | .605 | |
 Yankees - w | 93 | 68 | .578 | 4.5 |
 Red Sox - w | 87 | 75 | .537 | 11.0 |
79 | 82 | .491 | 18.5 | |
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| AL Central | W | L | PCT | GB |
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 White Sox - w | 84 | 78 | .519 | 1.0 |
77 | 85 | .475 | 8.0 | |
76 | 86 | .469 | 9.0 | |
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| AL West | W | L | PCT | GB |
 Astros - y | 81 | 81 | .500 | |
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