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Nicknamed "Big Mac", Mark McGwire was a power hitter and Gold Glove winning first baseman for the Oakland A’s and the St. Louis Cardinals. After breaking Roger Maris’ single season home run record he eventually found himself embroiled in baseball’s steroid abuse controversy. While at first he deflected questions of drug use, eventually he admitted to using performance-enhancing substances throughout the majority of his career. Despite his involvement with steroids, McGwire found success after his pro career as the hitting coach for the Los Angeles Dodgers.