The greatest season in major league history, according to Baseball-Reference.com's Wins Above Replacement, was Babe Ruth's 1923. That's probably not the Babe Ruth season you're thinking of: not the one in which he became a two-way star (8.0 WAR) or the one in which he outhomered 10 teams (9.9) or the one in which he nearly doubled the single-season home run record (11.9) or the one in which he set the single-season home run mark that would last until Roger Maris (12.4) or the one in which he set a record for total bases that still stands today (12.
Mike Trout is on pace for the greatest season in MLB history
