Did you know that the American League rookie with the highest slugging average in a single season is Mark McGwire who had a .618 mark with Oakland in one-hundred fifty-one (151) games played during the 1987 season?
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The National League single season record for slugging average was set in 2001 by Barry Bonds of the San Francisco Giants. The American League single season record for slugging average is on this page. Is either the Career Leader for Slugging Averages?