Manager Scott Servais said Phelps, who exited Wednesday's game with a trainer, is dealing with the same elbow injury that sidelined him earlier in the month, Greg Johns of MLB.com reports.

EDGE Analysis

This is a tough break for Phelps, as the 30-year-old returned from the disabled list just one week ago. While the severity of the injury isn't clear yet, Phelps was forced to miss a little more than two weeks earlier in the month while dealing with a similar issue, so it sounds like he could ultimately be headed back to the DL. He'll be reevaluated Thursday, after which there will likely be a decision regarding his status.