George O'Donnell vs. Brian Tollberg — Career Comparison

Looking at the career totals, George O'Donnell and Brian Tollberg are fairly close on the surface numbers. George O'Donnell had the edge in home runs allowed (0.41 per nine innings vs 1.17). By the career numbers, George O'Donnell 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.