It's always a risk and any player can get injured at any time, but maybe from his point of view he might feel he is not injury plagued anymore (played 33 games last year and 22 so far this season, best run in 5 years).
Only the player and club will know for sure, but it's hardly a wild assumption the club want to retain their asset, or that a lad who could have signed a contract at any time but hasn't wants explore what options are available for him at top-end teams or abroad after 9 seasons here, in what will likely be his last chance for a big move/big payday.