Harmon Killebrew is best known for playing with which MLB team?

What position did George Brett primarily play? What uniform number did George Brett wear with the Royals? What position did Kirby Puckett primarily play? What uniform number did Kirby Puckett wear with the Twins? What uniform number did Harmon Killebrew wear with the Twins? Which player was nicknamed "Killer"? What position did Joe Mauer primarily play? What uniform number did Joe Mauer wear with the Twins?