It was apparently a “freak accident” that led to Mariano Rivera’s injury during the Yankees Old Timer’s Day game, Andy Pettitte said during an appearance on WFAN on Saturday. At the

Rivera was locked in and laced a ground ball through the infield and into left for a single. The base hit moved Posada to second and put a big smile on Rivera's face as he rounded first base and laughed with Pettitte while getting some praise from Johnny Damon.

Hall of Famer Mariano Rivera tore an Achilles tendon while going after a flyball at the New York Yankees’ Old-Timers’ Day game on Saturday and needs surgery.