Clark's overall major league baseball career spans 16 playing seasons during which he played 1,976 games, batted .303 and hit 284 home runs. He holds the record for most productive performances in post season play with a .650 batting average in 1989. Clark prepped at Jesuit High School and was a three year letter winner on the baseball team. He later started three seasons at Mississippi State University and was a member of the 1984 U.S. Olympic Tour, during which he batted .393 and hit 13 homers in 35 games. Clark hit a home run on his first major league at bat off Hall of Fame pitcher Nolan Ryan.