Art Mahaffey had a 1-4 record with an ERA of 6.43, 19 strikeouts and 1 save in 12 appearances in his last season.
| 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 |  | A. Mahaffey | 1966 |  STL | 12 | 1 | 4 | .200 | 5 | 6.43 | 19 | 0 | 0 | 1 | 35.0 | 37 | 25 | 27 | 7 | 21 | 1 | 1 | 4 | 159 | 5 | 4.89 | 5.40 | 0.90 | 1.80 | 11.9 | 13.2 | 1.66 | .270 | 6.94 | 180 | 5.95 | 172 | 9.51 | -9.8 |
Games
| NAME | DATE | SEASON | TM | OPP | DEC | GS | ERA | SO | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | GF | IBB | TBF | WP | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | | A. Mahaffey | 7/17/1966 | 1966 | STL | vs |  CHC | L | 1 | 81.00 | 0 | 0 | 0 | 0 | 0.1 | 3 | 3 | 3 | 0 | 2 | 0 | 0 | 0 | 6 | 2 |
| 2 | | A. Mahaffey | 7/14/1966 | 1966 | STL | @ |  CIN | 0 | 0.00 | 2 | 0 | 0 | 0 | 2.0 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 8 | 0 | |
| 3 | | A. Mahaffey | 7/4/1966 | 1966 | STL | @ |  SFG | 0 | 0.00 | 0 | 0 | 0 | 0 | 2.0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 7 | 0 | |
| 4 | | A. Mahaffey | 6/28/1966 | 1966 | STL | vs | SFG | 0 | 13.50 | 1 | 0 | 0 | 0 | 2.0 | 3 | 3 | 3 | 1 | 1 | 1 | 0 | 1 | 11 | 0 | |
| 5 | | A. Mahaffey | 6/17/1966 | 1966 | STL | vs |  PHI | 0 | 0.00 | 1 | 0 | 0 | 0 | 4.1 | 3 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 16 | 1 | |
| 6 | | A. Mahaffey | 6/13/1966 | 1966 | STL | @ |  NYM | 0 | 0.00 | 3 | 0 | 0 | 1 | 1.2 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 7 | 0 | |
| 7 | | A. Mahaffey | 6/5/1966 | 1966 | STL | @ |  ATL | 0 | 13.50 | 1 | 0 | 0 | 0 | 2.0 | 3 | 3 | 3 | 1 | 0 | 0 | 0 | 0 | 9 | 0 | |
| 8 | | A. Mahaffey | 5/27/1966 | 1966 | STL | vs | CIN | L | 1 | 9.00 | 1 | 0 | 0 | 0 | 3.0 | 5 | 3 | 5 | 3 | 0 | 0 | 0 | 0 | 14 | 0 |
| 9 | | A. Mahaffey | 5/21/1966 | 1966 | STL | @ | CIN | L | 1 | 4.50 | 2 | 0 | 0 | 0 | 6.0 | 5 | 3 | 3 | 1 | 7 | 0 | 0 | 1 | 28 | 1 |
| 10 | | A. Mahaffey | 5/15/1966 | 1966 | STL | vs | ATL | W | 1 | 5.06 | 3 | 0 | 0 | 0 | 5.1 | 6 | 3 | 3 | 0 | 2 | 0 | 0 | 0 | 23 | 0 |
| 11 | | A. Mahaffey | 5/7/1966 | 1966 | STL | vs | SFG | L | 1 | 27.00 | 1 | 0 | 0 | 0 | 2.1 | 6 | 7 | 7 | 1 | 3 | 0 | 0 | 0 | 15 | 1 |
| 12 | | A. Mahaffey | 4/28/1966 | 1966 | STL | @ |  HOU | 0 | 0.00 | 4 | 0 | 0 | 0 | 4.0 | 1 | 0 | 0 | 0 | 3 | 0 | 0 | 1 | 15 | 0 | |
| Total | 5 | 6.43 | 19 | 0 | 0 | 1 | 35.0 | 37 | 25 | 27 | 7 | 21 | 1 | 1 | 4 | 159 | 5 |
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