Mike Duvall vs. Jeff Karstens — Career Comparison

Jeff Karstens built a career as a starting pitcher and Mike Duvall 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 4.76 and 1.863 for Mike Duvall. By the career numbers, Jeff Karstens had the better of this cross-role comparison — though era context would sharpen the verdict.