Angels C Rene Rivera out four to six weeks after knee surgery

Los Angeles Angels catcher Rene Rivera had surgery to repair a meniscus tear in his right knee Friday and is expected to miss four to six weeks, the team announced.

"It's obviously a tough break for Rene right now, a tough break for us," manager Mike Scioscia said.

The veteran Rivera is hitting .259 with three home runs and 10 RBIs in 22 games this season.

The Angels signed Rivera to a one-year, $2.8 million contract in the offseason as a backup to regular Martin Maldonado.

The Angels also said an MRI on right-hander Matt Shoemaker showed mild edema (swelling caused by fluid buildup) in his right forearm. Shoemaker also underwent a bone scan, the results of which haven't been announced.

Shoemaker landed on the disabled list after just one start this season and was moved to the 60-day disabled list last week.

Following Friday night's 2-1 loss to the Yankees, the Angels optioned outfielder Michael Hermosillo to Triple-A, and they plan to recall righty Jaime Barria(3-1, 2.13) to start Saturday's game.