Cubs manager Craig Counsell said July 8 that Roberts (forearm) completed a bullpen session, MLB.com reports.
Roberts had been scheduled to throw off a mound a second time prior to the All-Star break, though it's unclear if that came to pass. The right-hander has been on the shelf since June 29 due to forearm inflammation and will eventually need to complete a rehab assignment before returning from the 15-day injured list.