Dickerson (shoulder) was activated from the 10-day injured list Sunday, Alex Pavlovic of NBC Sports Bay Area reports.
The 30-year-old has been sidelined by a bone bruise in his left shoulder since May 5, but he'll rejoin the active roster after a brief stay on the injured list. Dickerson will presumably be in the lineup Sunday with righty Mitch Keller starting for Pittsburgh in the series finale.