Burnes (elbow/teres major) will throw his next bullpen Tuesday, Alex Weiner of ArizonaSports.com reports.
Burnes has spent most of the season recovering from Tommy John surgery, though he hit a snag in early June due to a teres major strain that shut him down from throwing. He resumed throwing just prior to the All-Star break and was cleared to throw bullpen sessions in early August, and the right-hander is targeting a return to the majors by early September.