Eflin won't start Thursday's game against the Diamondbacks after he experienced recurring discomfort in his right knee while warming up, Todd Zolecki of MLB.com reports.

EDGE Analysis

After missing more than five weeks with right patella tendinitis, Eflin was reinstated from the 10-day injured list Thursday, only to experience a setback less than two hours after being activated. The Phillies haven't indicated whether the issue is significant enough to send Eflin back to the IL, but more information on that front should be available within the next few days. Matt Moore, who had been expected to move to the bullpen, will instead pick up another spot start Thursday with Eflin unavailable.