Ted Williams, .634 is second only to Babe Ruth's .690 in all time slugging percentage. Gehrig .632 is third. Jimmie Foxx, .609, is fourth. These are four fabulous ball players. (Gehrig was 38?when he died and Ted missed five prime years in the military.) Bobby Doerr SLG in 1944 was.528 and .461 career. Like the Yankee Tommy Heinrich, Doerr was consistent and hit in the clutch, as did Heinrich.