What position did Mariano Rivera play?

What position did Derek Jeter play? What position did Johnny Bench play? What position did Mike Schmidt play? What position did Ken Griffey Jr. mainly play? What position did Edgar Martínez mostly play, becoming the award's namesake? MLB's award for the best designated hitter is named after which player? MLB's award for the best reliever in the American League is named after which pitcher? MLB's award for the best reliever in the National League is named after which pitcher?