How many games does each MLB team play in a regular season?

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? In which year did the American League adopt the designated hitter? In which year did MLB introduce the pitch clock? In which town is the Little League World Series held? In which city is the College World Series played?