there are many other reasons. see the rest of the posts.
Also:
One former Giants player, however, says Shockey was more trouble than he was worth, and those privy to the offensive inner-workings of the team are relieved he's not on the scene.
"I've been there, I've been in that locker room, I know how guys feel, I know how people in that organization feel," Tim Hasselbeck, a Giants backup quarterback in 2005 and 2006, said yesterday on the "Mike and Murray Show" on Sirius Satellite Radio.
"People there are relieved he's not around. There's this big stink about he's on injured reserve. How come he's not on the sideline supporting his team? Let me tell you something, they don't want him there. They're going to say all the right things, 'Oh yeah, we'd love to have him around' and all that stuff because he's their teammate, he's under contract next year and you can't do that. But when they're talking to people and it's not necessarily being reported they don't want him around. He's a distraction."
http://www.nypost.com/seven/01312008...ave_838837.htm
but why trust an actual player's opinion?