Philip Rivers ' return to the gridiron is being fast-tracked, as the Indianapolis Colts have activated the 44-year-old quarterback for their Week 15 road matchup against the Seattle Seahawks . Rivers will start on Sunday, CBS Sports' Jonathan Jones reports , after ending his five-year retirement on Tuesday by signing with the Colts practice squad . Now, he's on the verge of once again being a starting quarterback.

The Colts are desperate at quarterback. Daniel Jones suffered a torn Achilles in last Sunday's loss to the Jacksonville Jaguars . Former No. 4 overall pick Anthony Richardson is on injured reserve with an orbital fracture. Rookie Riley Leonard , who was expected to replace Jones in the starting lineup, has a knee injury, but is off the injury report. With

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