J. P. Feyereisen vs. George Mack — Career Comparison

George Mack built a career as a starting pitcher and J. P. Feyereisen as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. J. P. Feyereisen posted stronger surface numbers — ERA 3.27 and WHIP 1.137 compared to 7.19 and 1.890 for George Mack. By the career numbers, J. P. Feyereisen had the better of this cross-role comparison — though era context would sharpen the verdict.