Who founded the Negro National League in 1920?

How many career home runs did Miguel Cabrera hit in MLB? 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? Which Negro Leagues star was famed as perhaps the fastest player in baseball history? 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?