The Red Sox activated Whitlock (pectoral) from the 10-day injured list Sunday, Chris Cotillo of The Springfield Republican reports.

EDGE Analysis

Whitlock hasn't pitched since Sept. 19 due to a pectoral strain, but he'll likely see action if Sunday's game against the Nationals is close in the late innings. Further, he'll be one of manager Alex Cora' top relief options in any potential Game 163, wild card game or ensuing postseason round.