Appel (shoulder) will head to the 7-day disabled list Thursday, Stephen Gross of The Morning Call reports.

EDGE Analysis

The right-hander was placed on the DL with a right shoulder strain after going almost two full weeks without any time on the mound for Triple-A Lehigh Valley. His past two starts have been a little shaky, allowing four earned runs off 15 hits and seven walks during 10 innings of work. It has been a difficult year for Appel, and he may be in line to miss an extended period of time depending on the severity of this injury.