Brian Keyser vs. Wayne Rosenthal — Career Comparison

Looking at the career totals, Brian Keyser and Wayne Rosenthal are fairly close on the surface numbers. Brian Keyser posted stronger numbers in ERA (4.97 vs 5.4) and home runs allowed (0.77 per nine innings vs 1.2). Wayne Rosenthal had the advantage in WHIP (1.573 vs 1.684). By the career numbers, Brian Keyser had the better of this comparison — though ERA and WHIP alone don't account for era, park factors, or the defenses each pitcher worked behind.