Rotowire: Oct 30 / 9:49a ET
News: Villanueva filed for free agency Thursday, Mark Gonzales of the Chicago Tribune reports.
Impact: Villanueva appeared in 42 games this season, recording a 4.64 ERA across 77.2 total innings. He made five starts but worked primarily out of the bullpen. With contract up, Villanueva will seek out a new deal, likely with a new team, this offseason.