Sledge Hammer
Pro Bowler
I think what you may be missing is the fact that Howard hasn't been healthy for the past two years. His play could have declined base off that alone and I don't think The Ravens need a receiver right now.
Injuries can take their toll on a player to. Even b4 his last injury he was having a bad year last year and wasn't looking to good in preliminary minicamps. He is 31 and 350lbs. Probably not a tackle at this juncture of his career. But could probably be a really good mauling guard.