Yankee closer Mariano Rivera may be hanging up his glove.

The Yankees are set to hold a 10 a.m. news conference Saturday involving Rivera, but will not confirm what the focus will be.

It comes amid reports that Rivera plans to retire after the 2013 season.

Rivera is coming off knee surgery after being hurt fielding fly balls in the outfield last year.

He is the league's all-time saves leader with 608.