Ron Mrozinski was 1-1 with an ERA of 4.50 and 26 strikeouts in 15 appearances in his rookie season in 1954.
| 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 |  | R. Mrozinski | 1954 |  PHN | 15 | 1 | 1 | .500 | 4 | 4.50 | 26 | 1 | 0 | 0 | 48.0 | 49 | 24 | 26 | 10 | 25 | 0 | 6 | 214 | 1 | 4.88 | 4.69 | 1.04 | 1.88 | 12.1 | 11.7 | 1.54 | .255 | 4.88 | 113 | 5.59 | 141 | 9.19 | -8.8 |
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 | | R. Mrozinski | 9/24/1954 | 1954 | PHN | vs |  NYG | W | 1 | 2.70 | 3 | 0 | 0 | 0 | 6.2 | 3 | 2 | 2 | 1 | 1 | 0 | 0 | 0 | 25 | 0 |
| 2 | | R. Mrozinski | 9/18/1954 | 1954 | PHN | @ | NYG | 0 | 0.00 | 0 | 0 | 0 | 0 | 1.0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 3 | 0 | |
| 3 | | R. Mrozinski | 9/14/1954 | 1954 | PHN | vs |  STL | L | 1 | 5.00 | 4 | 1 | 0 | 0 | 9.0 | 9 | 5 | 5 | 2 | 4 | 0 | 0 | 0 | 39 | 0 |
| 4 | | R. Mrozinski | 9/8/1954 | 1954 | PHN | vs |  CIN | 0 | 4.50 | 0 | 0 | 0 | 0 | 2.0 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 7 | 0 | |
| 5 | | R. Mrozinski | 9/3/1954 | 1954 | PHN | @ |  PIT | 0 | 0.00 | 3 | 0 | 0 | 0 | 2.1 | 1 | 0 | 1 | 0 | 4 | 0 | 0 | 0 | 13 | 0 | |
| 6 | | R. Mrozinski | 8/29/1954 | 1954 | PHN | @ | CIN | 1 | 10.13 | 2 | 0 | 0 | 0 | 2.2 | 5 | 3 | 3 | 1 | 3 | 0 | 0 | 0 | 16 | 0 | |
| 7 | | R. Mrozinski | 8/18/1954 | 1954 | PHN | @ | NYG | 0 | 2.70 | 2 | 0 | 0 | 0 | 3.1 | 2 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 12 | 0 | |
| 8 | | R. Mrozinski | 8/15/1954 | 1954 | PHN | vs | PIT | 0 | 0.00 | 0 | 0 | 0 | 0 | 0.1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | |
| 9 | | R. Mrozinski | 8/13/1954 | 1954 | PHN | vs | PIT | 0 | 0.00 | 1 | 0 | 0 | 0 | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 3 | 0 | |
| 10 | | R. Mrozinski | 7/30/1954 | 1954 | PHN | vs | STL | 0 | 9.00 | 1 | 0 | 0 | 0 | 2.0 | 4 | 2 | 2 | 1 | 0 | 0 | 1 | 0 | 10 | 0 | |
| 11 | | R. Mrozinski | 7/25/1954 | 1954 | PHN | @ |  CHC | 0 | 9.00 | 1 | 0 | 0 | 0 | 1.0 | 2 | 1 | 1 | 0 | 1 | 0 | 1 | 0 | 6 | 0 | |
| 12 | | R. Mrozinski | 7/23/1954 | 1954 | PHN | @ | CHC | 0 | 0.00 | 0 | 0 | 0 | 0 | 1.2 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 7 | 0 | |
| 13 | | R. Mrozinski | 7/19/1954 | 1954 | PHN | @ | STL | 0 | 4.50 | 3 | 0 | 0 | 0 | 2.0 | 3 | 1 | 2 | 0 | 1 | 0 | 1 | 11 | 0 | ||
| 14 | | R. Mrozinski | 7/17/1954 | 1954 | PHN | @ | CIN | 1 | 3.52 | 3 | 0 | 0 | 0 | 7.2 | 10 | 3 | 3 | 1 | 4 | 0 | 0 | 0 | 36 | 0 | |
| 15 | | R. Mrozinski | 6/20/1954 | 1954 | PHN | vs | CIN | 0 | 8.44 | 3 | 0 | 0 | 0 | 5.1 | 7 | 5 | 5 | 3 | 3 | 0 | 0 | 0 | 25 | 1 | |
| Total | 4 | 4.50 | 26 | 1 | 0 | 0 | 48.0 | 49 | 24 | 26 | 10 | 25 | 0 | 6 | 214 | 1 |
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