The Phillies transferred Eflin (kneecap) to the 60-day injured list Tuesday, Todd Zolecki of MLB.com reports.
The move delays Eflin's return until the final week of August at the earliest. Before going down in late June, the righty had pitched to a 4.37 ERA and 1.19 WHIP with 56 strikeouts in 68 innings. Assuming he comes back healthy before the season ends, Eflin will likely slot back into the back part of Philadelphia's rotation.