Trivia: Name the only Astronaut that once wore a Cowboy Uniform

[Hostile]

Those are great. I knew Carl Lewis just because I'm old enough, but I have no idea on the Basketball Coach. What is the answer?

Dallas drafted Pat Riley, a basketball player at Kentucky in the 11th round of the 1967 Draft.

 

[KJJ]

Mo Claiborne?

He's lost in space.