Lamar relies on his electric physical skills to make plays, but by the end of the season he's always beat up and injured and not the same guy. It won't get better as he ages, either.
Henry just looks done. Another guy who starts off great but takes a beating and by the time the biggest games come he is a shell of himself due to nagging injuries.
All this said, the Ravens are nowhere near out of it. 1 game back with another to play vs Pittsburgh, and both teams have some potentially tough games coming up.