From the 08/14 episode of Hard Knocks, Chad's Dolphins release video.
"[Ochocinco]'s best asset is his ability to get separation on routes, But you want a disciplined receiver to be in the right spots, and that's not what this guy is. I would not have touched him. His personality issues are not going to change. I don't know if he’s ever going to get it." - Unnamed NFL GM
Title says it all.