Musgrove (elbow) threw a "light" bullpen session Monday, MLB.com reports.
Musgrove completed his first bullpen session since going on the 15-day injured list due to right elbow inflammation in early May. The right-hander is expected to throw another side session Wednesday, and if that goes well, he could return to the Padres rotation without needing a rehab stint. Musgrove is tracking toward making his next start during San Diego's series in Atlanta during the upcoming weekend.