Nick Pivetta exits rehab appearance with apparent injury

Padres right-hander Nick Pivetta walked off the mound with an apparent injury during a rehab appearance with Single-A Lake Elsinore on Tuesday afternoon.

Pivetta has been sidelined since early April with a flexor strain in his right elbow, and the Padres had been targeting a late August return. But Pivetta threw his 14th pitch of the afternoon and abruptly walked off the mound in Lake Elsinore…