Jeff Karstens vs. Zack Weiss — Career Comparison

Jeff Karstens 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. Jeff Karstens posted stronger surface numbers — ERA 4.44 and WHIP 1.362 compared to 4.61 and 1.280 for Zack Weiss. By the career numbers, Jeff Karstens had the better of this cross-role comparison — though era context would sharpen the verdict.