The next big match-up between a Youtuber and a ‘proper’ boxer is the bout between Jake Paul and Mike Tyson this summer.
Payne was fired by Louisville last month after compiling a 12-52 record in his two seasons in charge.
Cooper, now 67, spent 42 days with the Braves in 1980, falling one day short of the minimum.
Sheppard is projected as a top-10 pick come June.