Apparently out of contract this year. Fremantle took him in the first round what 4 or 5 years ago and got very little in return so far mainly due to injuries. Got to keep him IMO.
I think Griffin is still only about 22 or 23 so he is still developing as a defender. I agree that the Dockers must try and hang on to him as I am sure he will be an integral part of the team in years to come.