Andrew Puk: Everything you need to know

Puk (elbow) threw a bullpen session Tuesday and provided an update following the activity, Alex Weiner of Arizona Sports reports. The earliest date Puk can be activated from the 60-day injured list is May 21, and the reliever estimated he'd be "facing batters or starting rehab games" around then. The left-hander is four bullpen sessions in and will throw at least another six before facing hitters.

Puk (elbow) has thrown multiple bullpen sessions since late March, Alex Weiner of Arizona Sports reports. Puk is coming back from an internal brace procedure he underwent last June. Diamondbacks manager Torey Lovullo said Tuesday that his best guess is that Puk returns to the team at some point in June.

Puk (elbow) has begun throwing bullpen sessions off a mound, MLB.com reports. The sessions are described as "short box," which is when a catcher sets up just in front of home plate. Puk underwent internal brace elbow surgery last June and is expected back sometime around the All-Star break.