Clark was born in South Amboy, New Jersey, where he attended St. Mary's High School, and joined the New York Yankees organization after graduating.

He was unable to stay in baseball shape due to combat duties, and as a result of having slowed down, the Yankees organization converted him to an outfielder and third baseman.

[5] Clark played well enough in 1946 to earn a tryout for the 1947 New York Yankees, and competed with Frank Colman for the final outfield position.

In game seven, he served as a pinch hitter for Yogi Berra, hitting a single, which helped the Yankees win the World Series; he considered this one of his greatest moments in professional baseball.

[7] To begin the 1948 season, Clark was in a crowded outfield position battle, with Larry Doby, Thurman Tucker, and Walt Judnich fighting for playing time, but Clark was noted as the most interesting to watch by The Sporting News due to owner Bill Veeck's high regard for him.

[13] Clark started the 1949 season primarily as a pinch hitter, having lost his platoon duties alongside Edwards to Bob Kennedy.

[19] In a game on June 12, Clark ran into the outfield fence chasing a fly ball, and missed some playing time as a result.

[22] In 20 games with the Athletics, Clark had a .203 batting average and 13 RBIs, which led the team when that he was sold to the Chicago White Sox in mid-May.

[23] A month later, after playing in nine games for the White Sox, he was purchased by the Rochester Red Wings for $20,000, returning to the minors and ending his major league career.

[24] Clark spent the next five seasons with the Rochester Red Wings of the International League, part of the St. Louis Cardinals organization.

[26] To start the 1955 season, Clark held out for a new deal because he felt that he deserved a promotion to the Cardinals' major league roster; he ended the holdout in March.

[27] That season, he hit .308 with 23 home runs, 84 RBIs, and was named as a finalist for the International League Most Valuable Player Award.

[30] In his final year of professional baseball, he played a combined 70 games with the New Orleans Pelicans, San Antonio Missions, and Indianapolis Indians.

[5] After retiring from professional baseball, Clark worked for 30 years as an employee of Iron Workers Local 373, and served as a member of the South Amboy city council.