Mariano Rivera Signed MLB Baseball w/ "99 WS MVP" Insc
He entered. He dominated. He exited. That's how Mariano Rivera, arguably the greatest relief pitcher of all-time, was when he pitched during his memorable years as a New York Yankee. Now you can own this signed & inscribed "99 WS MVP" by Rivera & add it to your already awesome collection. This item is authenticated by Steiner Sports.