John Foster vs. Jeff Gray — Career Comparison

On the career pitching numbers, Jeff Gray posted a stronger line than John Foster. Jeff Gray posted stronger numbers in WHIP (1.536 vs 1.615) and home runs allowed (1.15 per nine innings vs 1.63). By the career numbers, Jeff Gray 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.