"Had an MRI exam this morning," said Pham, whom the Rays acquired from the Cardinals for three Minor Leaguers on Tuesday. "It showed a hairline fracture. So kind of explained what I was feeling this morning. ... I thought it was just like a bruise. It's more than that."
Pham said team doctors told him he'd be out two to four weeks.
"Not the best start, not the start I imagined," said Pham, who wore a boot on his right foot. "I can't do much this first few days. After that, I'll get re-evaluated to see if I can do anything."
Rays manager Kevin Cash said they would try to keep Pham off his feet for a few days, in an effort to see how quickly he can recover.
"Don't want him to force it, because we want him to be healthy when he gets back," Cash said. "But we think he'll be able to manage this and get back fairly quickly."
Bill Chastain has covered the Rays for MLB.com since 2004.