TAMPA, Fla. -- Yankees right-hander Edwar Ramirez has mild bursitis in his pitching shoulder and does not expect to throw until the weekend.

Ramirez had to shut down a bullpen session after a few pitches on Sunday when he felt discomfort. The Yankees sent Ramirez for a MRI under the supervision of Dr. Allen Miller on Monday, announcing that he would be sidelined for a minimum of three days.

"He's going to be down for a few days," Yankees manager Joe Girardi said. "The hope is to get him back on the mound shortly. We're not considering it to be a long time, and flat ground would be the first thing that he would do. We're hoping to maybe do that this week."

Ramirez turned down an opportunity to pitch for the Dominican Republic in the World Baseball Classic so he would have a chance at making the Yankees' roster out of camp. He said that he was relieved to hear the diagnosis.

"It's not something bad," Ramirez said. "I've got about four or five days without throwing, medicine, and I'll be ready next week. I have time."

The 27-year-old was 5-1 with a 3.90 ERA in 55 relief appearances for the Yankees in 2008. Girardi has said that Ramirez is in competition for a middle-relief role this spring.

"We think that through treatment, he should get better fairly quickly," Girardi said.

Additionally, Yankees shortstop Derek Jeter is having no issues from a sore right hamstring that he revealed earlier in the week. Girardi said that Jeter went through all of the club's conditioning drills on Tuesday and is expected to play unrestricted in New York's Grapefruit League opener on Wednesday at 1:05 p.m. ET against the Blue Jays in Dunedin, Fla.