Cook (hamstring) warmed up with his teammates Friday, then left the practice field before the start of the session, Andrew Krammer of the Minneapolis Star Tribune reports.
Cook did the same thing Thursday and was listed as a non-participant on the injury report. His status as a full participant Wednesday created some optimism about his outlook for the weekend, but it now appears the second-year back could be headed for another game-time decision ahead of Sunday's matchup with the Jets at 1 p.m. EDT. The Vikings will provide another update on Cook later Friday when the team releases its final injury report of the week.