Brubaker (thumb) will be activated from the 10-day injured list to start Saturday's game against the Cubs, Kevin Gorman of TribLive.com reports.
A right thumb contusion forced Brubaker to the IL on Aug. 25. He will return to action having bypassed a rehab assignment, with the Pirates evidently seeing enough during Brubaker's Sept. 1 side session. Pittsburgh still needs to make a move to clear a roster spot for Brubaker, who sits with a 5.27 ERA, 1.28 WHIP and 124:36 K:BB so far this season.