Mark McGwire

Mark David McGwire (born October 1, 1963 in Pomona, California) is a former right-handed First baseman in Major League Baseball who played for the Oakland Athletics (1986–1997) and the St. Louis Cardinals (1997–2001). He had a career .263 Batting average, and 583 Home Runs. 
Although McGwire has never admitted to or been convicted of any steroid use, many of his accomplishments, particularly his historic home run surge late in his career, have come into question due to his connection to the steroid scandal in Major League Baseball.