Matt Mantei played 10 seasons for the Diamondbacks, Marlins and Red Sox. He had 14 wins, 18 losses, 93 saves, an ERA of 4.07 and 396 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 |  | M. Mantei | 1995 |  FLA | 12 | 0 | 1 | .000 | 0 | 4.73 | 15 | 0 | 0 | 0 | 13.1 | 12 | 7 | 8 | 1 | 13 | 0 | 3 | 0 | 64 | 1 | 10.13 | 8.78 | 1.15 | 0.68 | 23.4 | 20.3 | 1.88 | .314 | 5.40 | 114 | 4.75 | 113 | 8.10 | -0.8 |
| 2 | | M. Mantei | 1996 | FLA | 14 | 1 | 0 | 1.000 | 0 | 6.38 | 25 | 0 | 0 | 0 | 18.1 | 13 | 13 | 13 | 2 | 21 | 1 | 1 | 1 | 89 | 2 | 12.27 | 10.31 | 1.19 | 0.98 | 28.1 | 23.6 | 1.85 | .275 | 6.38 | 155 | 5.45 | 128 | 6.38 | -2.5 |
| 3 | | M. Mantei | 1998 | FLA | 42 | 3 | 4 | .429 | 0 | 2.96 | 63 | 0 | 0 | 9 | 54.2 | 38 | 18 | 19 | 1 | 23 | 7 | 23 | 3 | 224 | 0 | 10.37 | 3.79 | 2.74 | 0.16 | 28.1 | 10.3 | 1.12 | .285 | 3.13 | 73 | 2.71 | 64 | 6.26 | 9.3 |
| 4 | | M. Mantei | 1999 | TOT | 65 | 1 | 3 | .250 | 0 | 2.76 | 99 | 0 | 0 | 32 | 65.1 | 44 | 20 | 21 | 5 | 44 | 5 | 60 | 1 | 284 | 2 | 13.64 | 6.06 | 2.25 | 0.69 | 34.9 | 15.5 | 1.35 | .298 | 2.89 | 61 | 3.34 | 73 | 6.06 | 9 |
| 5 | | M. Mantei | 2000 |  ARI | 47 | 1 | 1 | .500 | 0 | 4.57 | 53 | 0 | 0 | 17 | 45.1 | 31 | 23 | 24 | 4 | 35 | 2 | 38 | 1 | 200 | 5 | 10.52 | 6.95 | 1.51 | 0.79 | 26.5 | 17.5 | 1.46 | .255 | 4.76 | 97 | 4.38 | 92 | 6.15 | 1.9 |
| 6 | | M. Mantei | 2001 | ARI | 8 | 0 | 0 | 0 | 2.57 | 12 | 0 | 0 | 2 | 7.0 | 6 | 2 | 2 | 2 | 4 | 0 | 7 | 0 | 31 | 2 | 15.43 | 5.14 | 3.00 | 2.57 | 38.7 | 12.9 | 1.43 | .308 | 2.57 | 57 | 5.04 | 114 | 7.71 | -0.5 | |
| 7 | | M. Mantei | 2002 | ARI | 31 | 2 | 2 | .500 | 0 | 4.73 | 26 | 0 | 0 | 0 | 26.2 | 28 | 14 | 15 | 3 | 12 | 1 | 6 | 0 | 122 | 1 | 8.78 | 4.05 | 2.17 | 1.01 | 21.3 | 9.8 | 1.50 | .313 | 5.06 | 110 | 3.93 | 91 | 9.45 | 1.2 |
| 8 | | M. Mantei | 2003 | ARI | 50 | 5 | 4 | .556 | 0 | 2.62 | 68 | 0 | 0 | 29 | 55.0 | 37 | 16 | 17 | 6 | 18 | 2 | 44 | 1 | 220 | 1 | 11.13 | 2.95 | 3.78 | 0.98 | 30.9 | 8.2 | 1.00 | .246 | 2.78 | 58 | 3.06 | 69 | 6.05 | 8.4 |
| 9 | | M. Mantei | 2004 | ARI | 12 | 0 | 3 | .000 | 0 | 11.81 | 13 | 0 | 0 | 4 | 10.2 | 17 | 14 | 15 | 5 | 6 | 0 | 9 | 1 | 55 | 0 | 10.97 | 5.06 | 2.17 | 4.22 | 23.6 | 10.9 | 2.16 | .387 | 12.66 | 259 | 8.38 | 185 | 14.34 | -4.4 |
| 10 | | M. Mantei | 2005 |  BOS | 34 | 1 | 0 | 1.000 | 0 | 6.49 | 22 | 0 | 0 | 0 | 26.1 | 23 | 19 | 20 | 1 | 24 | 5 | 5 | 1 | 125 | 5 | 7.52 | 8.20 | 0.92 | 0.34 | 17.6 | 19.2 | 1.78 | .301 | 6.84 | 144 | 5.14 | 121 | 7.86 | -2.7 |
| Total | 315 | 14 | 18 | .438 | 0 | 4.07 | 396 | 0 | 0 | 93 | 322.2 | 249 | 146 | 154 | 30 | 200 | 23 | 196 | 9 | 1,414 | 19 | 11.05 | 5.58 | 1.98 | 0.84 | 28.0 | 14.1 | 1.39 | .286 | 4.30 | 92 | 3.91 | 88 | 6.95 | 18.8 |
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