Trevor Cahill vs. George O'Donnell — Career Comparison

Looking at the career totals, Trevor Cahill and George O'Donnell are fairly close on the surface numbers. Trevor Cahill posted stronger numbers in ERA (4.26 vs 4.53) and WHIP (1.376 vs 1.443). George O'Donnell had the advantage in home runs allowed (0.41 per nine innings vs 1.01). By the career numbers, Trevor Cahill 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.