He accepted a football scholarship from Texas A&M University under head coach Jim Myers.
[2] In 1964, the Pittsburgh Steelers acquired Clark after deciding to trade Lou Michaels to the Baltimore Colts.
[5] The Dallas Cowboys convinced him to play in his home state and traded center Mike Connelly to the Steelers in exchange for his rights.
[6] In 1968, Clark replaced the recently retired Danny Villanueva, becoming the first Aggie to play for the Dallas Cowboys.
In 1969, Clark was again second in the league, with 103 points, while establishing a franchise record with 20 field goals, although he is mostly remembered for a playoff game against the Cleveland Browns, where he received an offside penalty for whiffing on an onside kick and when he attempted a second try, he received another penalty because the onside kick did not travel the required 10 yards.
[11] He suffered a broken arm in the Bills' final preseason game and was placed on the injured reserve list.