Which Negro Leagues star was famed as perhaps the fastest player in baseball history?

How many career home runs did Gary Sheffield hit in MLB? How many career home runs did Eddie Murray hit in MLB? Which Negro Leagues pitching legend made his MLB debut with Cleveland at age 42 in 1948? Who founded the Negro National League in 1920? Which Negro Leagues player and manager later became MLB's first Black coach, with the Cubs in 1962? Which Dodgers executive signed Jackie Robinson? Who became MLB's first Black manager, with Cleveland in 1975? How far is the pitching rubber from home plate?