Harvin was hurt while attempting to pull in a Russell Wilson pass late in the second quarter. He took a hard hit in the end zone and his helmet appeared to make hard contact with the turf at CenturyLink Field.
Harvin was quickly moved to the locker room after the hit, one of two trips the wide receiver made to be evaluated for a concussion.
Saturday counted as Harvin's first action since Week 11. He played just one regular-season game while recovering from surgery to repair a torn labrum in his hip. He had three catches for 21 yards in the first two quarters of Saturday's playoff win.