MLB icon Mariano Rivera was hospitalized after suffering an injury at the New York Yankees' Old-Timers' Day game on Saturday.

The 55-year-old's former MLB teammate, Roger Clemens, revealed the stunning news after the festivities at Yankee Stadium, where the Bronx Bombers beat the Houston Astros .

Clemens appeared on the Yankees ' radio broadcast with Suzyn Waldman and Dave Sims.

During the appearance, he shared that Rivera suffered an Achilles injury during Old-Timers' Day, which honored the 25th anniversary of the 2000 World Series title-winning team.

"It was a fun day until we just heard about Mariano ," Clemens told New York 's WFAN.

"Mariano hurt his Achilles.

"I don't know what was going on.

"We all thought it was a hamstring, but I think it's a little worse than

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