Should I be worried?

I think there is a legitimate reason for concern, but there is also the possibility that the offense is transformed to a lethal level. If Graham works out and one of the WR's can step up and become a real #1, watch out...and pick your poison with Lynch and Wilson also. A number of IF's, but also a reasonable possibility.

There is also the possibility that the offense becomes too predictable with formations and personnel. Graham isn't exactly a traditional in line TE. How much can he really contribute in a power run formation? For Graham to be an effective 3 down player, Seattle just may need to be something that they're not.

Whatever happens, it's not going to go unnoticed.

I would be a bit worried. For one thing, the Seahawks are a team built to run the ball and Jimmy Graham isn't a very good run blocker. He became a big weapon in New Orleans because their offense was built on the pass and using Graham almost exclusively as a receiver. Unless he either improves a lot at blocking, the Seahawks change their offense a lot, or Graham converts to a big WR, it could be an issue.

Another think I would be worried about is that Graham has a history of disappearing against more physical defenses, such as the ones in the NFC West.

Graham is a big talent and can help the team. What you have to worry about is his health and ability to stay on the field

I would be worried. They lost their best offensive lineman and we saw in that Packers game how Wilson does without good blocking.

Actually, it depends on his work ethic during every offseason. If Jimmy Graham works hard and performs very well in practice every day, he will greatly improve his chances of becoming an elite NFL tight end for the Seattle Seahawks in the future.