I am old but not that old. I have only seen Motley on film, not in person.
I do remember seeing the Colts' HB Buddy Young beat a race horse in a 50 yard dash! I think it was a Colts' preseason game in the 1950s.
Here's an interesting question: Who broke the color barrier in professional sports?
Not Jackie Robinson. Several black players played in the NFL (including Motley and Woody Strode who played the black gladiator in Spartacus (1960) before Robinson broke the color barrier in professional baseball.
Then there is Fritz Pollard who beoke the NFL color barrier before there was a color barrier. He was one of the first black RBs and the first black head coach, both in 1921.