Yates (elbow) threw a bullpen session Friday, Mark Bowman of MLB.com reports.
Yates has been sidelined since mid-September due to right elbow inflammation but has been optimistic he'll be able to return this season. It's not yet clear whether he'll be available for the playoffs, but he's trending in the right direction and would likely be able to have a relatively normal offseason, even if he isn't cleared to return to game action.