Iannetta was taken out of the game in the second inning when Cleveland first baseman Russ Canzler fouled a ball off the catcher's throwing arm. He was not taken for X-rays but was wearing a sleeve over his arm on Saturday morning.
"I think it's just a bruise," Iannetta said Saturday. "It swelled up a little bit. Just wait for the swelling and inflammation to go down and we'll be OK."
Alberto Rosario caught and batted ninth in the Angels' lineup on Saturday against the Brewers. Iannetta said he did not know how long he'd be out but that he would be taking the day off on Saturday.
"His elbow's very sore, just from bruising," manager Mike Scioscia said Saturday. "Nothing seems like it's impacted, as far as any kind of fracture or anything. It feels better today than it did yesterday, but not good enough to play. It's gonna be three, four, five days, who knows, before he's back. It's gonna take a while to let this calm down."
Iannetta, batting .222 with a home run and four RBIs this spring, was acquired during the offseason for right-hander Tyler Chatwood in a trade with the Rockies. The 28-year-old, who had spent his entire six-year career with Colorado, is expected to be the Angels' primary backstop for the year.