Jeff Niemann played 5 seasons for the Rays. He had 40 wins, 26 losses, an ERA of 4.08 and 409 strikeouts.
| NAME | SEASON | TM | G | W | L | W% | GS | ERA | SO | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | GF | IBB | TBF | WP | K/9 | BB/9 | K/BB | HR/9 | K% | BB% | WHIP | BABIP | RA | ERA- | FIP | FIP- | H/9 | PRAA | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | J. Niemann | 2008 |  TBR | 5 | 2 | 2 | .500 | 2 | 5.06 | 14 | 0 | 0 | 0 | 16.0 | 18 | 9 | 12 | 3 | 8 | 1 | 2 | 0 | 76 | 0 | 7.88 | 4.50 | 1.75 | 1.69 | 18.4 | 10.5 | 1.63 | .300 | 6.75 | 120 | 5.50 | 129 | 10.13 | -2.2 |
| 2 | | J. Niemann | 2009 | TBR | 31 | 13 | 6 | .684 | 30 | 3.94 | 125 | 2 | 2 | 0 | 180.2 | 185 | 79 | 84 | 17 | 59 | 9 | 1 | 1 | 769 | 6 | 6.23 | 2.94 | 2.12 | 0.85 | 16.3 | 7.7 | 1.35 | .301 | 4.18 | 93 | 4.06 | 94 | 9.22 | 5.3 |
| 3 | | J. Niemann | 2010 | TBR | 30 | 12 | 8 | .600 | 29 | 4.39 | 131 | 1 | 1 | 0 | 174.1 | 159 | 85 | 86 | 25 | 61 | 7 | 0 | 6 | 733 | 4 | 6.76 | 3.15 | 2.15 | 1.29 | 17.9 | 8.3 | 1.26 | .263 | 4.44 | 112 | 4.60 | 114 | 8.21 | -11.4 |
| 4 | | J. Niemann | 2011 | TBR | 23 | 11 | 7 | .611 | 23 | 4.06 | 105 | 1 | 0 | 0 | 135.1 | 131 | 61 | 65 | 18 | 37 | 5 | 0 | 1 | 572 | 7 | 6.98 | 2.46 | 2.84 | 1.20 | 18.4 | 6.5 | 1.24 | .278 | 4.32 | 105 | 4.13 | 104 | 8.71 | -2.7 |
| 5 | | J. Niemann | 2012 | TBR | 8 | 2 | 3 | .400 | 8 | 3.08 | 34 | 0 | 0 | 0 | 38.0 | 30 | 13 | 17 | 2 | 12 | 2 | 0 | 0 | 156 | 2 | 8.05 | 2.84 | 2.83 | 0.47 | 21.8 | 7.7 | 1.11 | .264 | 4.03 | 79 | 3.09 | 76 | 7.11 | 4.1 |
| Total | 97 | 40 | 26 | .606 | 92 | 4.08 | 409 | 4 | 3 | 0 | 544.1 | 523 | 247 | 264 | 65 | 177 | 24 | 3 | 8 | 2,306 | 19 | 6.76 | 2.93 | 2.31 | 1.07 | 17.7 | 7.7 | 1.29 | .281 | 4.36 | 102 | 4.22 | 103 | 8.65 | -7 |
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