Robert Keys vs. Andy Sonnanstine — Career Comparison

Looking at the career totals, Robert Keys and Andy Sonnanstine are fairly close on the surface numbers. Robert Keys posted stronger numbers in ERA (4.8 vs 5.26) and home runs allowed (0.47 per nine innings vs 1.32). Andy Sonnanstine had the advantage in WHIP (1.414 vs 1.593). By the career numbers, Robert Keys 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.