Clark graduated from Brewer High School in Fort Worth, Texas.[1] Before the 1961 season, he was signed by the Philadelphia Phillies as an amateur free agent (prior to the draft).
Clark helped the Twins in the first half of the 1969 season en route to the team winning the American League West. He also contributed to the Athletics’ successes in getting to the 1971 AL Western Division series and the 1972 World Series championship.