Kenny Rosenberg vs. Zack Weiss — Career Comparison

Kenny Rosenberg built a career as a starting pitcher and Zack Weiss as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Zack Weiss posted stronger surface numbers — ERA 4.61 and WHIP 1.280 compared to 4.66 and 1.507 for Kenny Rosenberg. By the career numbers, Zack Weiss had the better of this cross-role comparison — though era context would sharpen the verdict.