Snell (elbow) threw a 15-pitch bullpen session Friday, and manager Dave Roberts said it went well, David Vassegh of AM 570 LA Sports reports.
The session was Snell's first proper bullpen since he underwent a NanoScope procedure on his left elbow May 19. Per MLB.com, the veteran lefty is expected to need at least four more bullpens before he's cleared to face hitters. That puts his timeline to return beyond the All-Star break, though it's possible he could be activated before the end of July.