Hendriks (forearm) threw a bullpen session Monday prior to Chicago's series opener in Anaheim, Scott Merkin of MLB.com reports.

EDGE Analysis

Manager Tony La Russa would not commit to Hendriks needing a Triple-A rehab assignment before returning, but it sounds like he's on track for activation sometime in early July. Meanwhile, Kendall Graveman is likely to continue to filling in for saves in Hendriks' absence.