Warren (groin) was not practicing Friday, Nathan Brown of The Indianapolis Star reports.
With Warren now absent from practice again Friday after also missing the Colts' first two sessions of the week, his status for Sunday's game against the Vikings is in serious doubt. If he isn't available, Indianapolis would again be left to lean on Keenan Allen and Josh Downs in the passing game, while Will Mallory, Mo Alie-Cox, Drew Ogletree and Pharaoh Brown would likely all see snaps at tight end.