Frank Keffer vs. Tyler Robertson — Career Comparison

Looking at the career totals, Frank Keffer and Tyler Robertson are fairly close on the surface numbers. Frank Keffer had the edge in home runs allowed (0 per nine innings vs 1.73). By the career numbers, Frank Keffer 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.