Mariano Rivera signed game used ball from 500th save game. The greatest reliever of all time has signed the Official Major League (Selig) ball on the sweet spot along with the inscription "500th Save 6/28/09." Stampings are bold and include 2009 Inaugural Season of the new Yankee Stadium, and ball shows nice use. Though he closed out the Pinstripes' Subway Series sweep with a 4-2 win over the Mets, he was perhaps more thrilled at his other accomplishment - recording his first career RBI on the strength of a 9th-inning, bases loaded walk.