Snell (elbow) will throw a 15-pitch bullpen session Friday, David Vassegh of AM 570 LA Sports reports.
Snell technically began throwing off a mound Saturday to a standing catcher, but Friday will be his first proper bullpen session since he underwent surgery on his elbow in mid-May. The veteran southpaw won't be eligible to return from the injured list until after the All-Star break, though he could still return relatively early in the second half if his rehab continues to progress smoothly.