Memmelaar accepted a football scholarship from the University of Wyoming, where he was a three-year starter at offensive tackle.
[2] As a senior Memmelaar was named team captain, contributing to the Skyline Conference Championship and the 14-6 defeat of Hardin–Simmons University in the Sun Bowl.
The next year, the Browns again reached the NFL Championship game, but lost 12-23 against the Green Bay Packers.
On June 21, 1966, he was traded to the Baltimore Colts in exchange for a sixth round draft choice (#151-Martine Bircher).
In 1967, he was on the Colts' reserve squad while recuperating from a knee injury, until being activated on December 8, to replace the retired Jim Parker.
His experience cutting his siblings' hair as children led him to become his team's barber while with the Dallas Cowboys.