Darvish (elbow) will undergo an MRI, Anthony Andro of FOX Sports Southwest reports. The Rangers understandably want to know the full extent of Darvish's injury before deciding on a course of action, so they'll send him for additional testing Thursday. GM Jon Daniels said he doesn't think the ligament is involved. Darvish was placed on the 15-day DL on Wednesday with what has been tentatively labeled elbow inflammation, and Robbie Ross will be recalled to start in his place Thursday.