Mark David McGwire (born October 1, 1963), nicknamed "Big Mac", is an American former professional baseball player currently serving as the hitting coach for the Los Angeles Dodgers of Major League Baseball (MLB). As a first baseman, his MLB career spanned from 1986 to 2001 while playing for the Oakland Athletics and the St. Louis Cardinals. He quickly grabbed media attention in 1987 as a rookie with the Athletics by hitting 33 home runs before the All-Star break, and would lead the major leagues in home runs that year with 49, setting the single-season rookie record. He appeared in six straight All-Star Games from 1987 to 1992 despite a brief career decline related to injuries. Another string of six consecutive All-Star appearances followed from 1995 to 2001. Each season from 1996 to 1999, he again led the major leagues in home runs.