Rosenthal (back) is hoping to return to Grapefruit League action by the weekend, Jenifer Langosch of MLB.com reports.

EDGE Analysis

Rosenthal underwent a precautionary MRI after being shut down with back issues last week, and the results came back negative. "I knew that it wasn't anything serious," Rosenthal said. "They just wanted to be sure, since it's in that area, that it wasn't worse than it was." He began throwing again Tuesday, and said he didn't experience any discomfort while playing catch, moving him along to a bullpen session tentatively set for Thursday. If all goes well there, the 26-year-old should be on track to return to spring league action over the weekend.