Which legendary Negro Leagues pitcher made his MLB debut at age 42 in 1948?

What jersey number has been retired across all of MLB in honor of Jackie Robinson? In what year was Jackie Robinson's number 42 retired by all MLB teams? Which Pirates star died in a 1972 plane crash while delivering aid to Nicaragua? MLB's annual award for a player's community service is named after which player? Which Negro Leagues catcher was called "the Black Babe Ruth" for his power? In which city is the Negro Leagues Baseball Museum located? In which village is the National Baseball Hall of Fame located? In what year was the first National Baseball Hall of Fame class elected?