1-he was not injured previously before being drafted.
2- they don't have near the # of players signed to big $'s (like we have/did)...and are still paying for when gone.
3-he has earned the raise
Overall I don't think you can equate the deal with the RAMS/TGII with this deal....TGIII deal was IMO a cornerstone for the "next " cat....McCaffery is in that role now. They don't have deals with a QB, DT, WR, RB like we did.....He's a great player...will they use him up? Hell yes that's why they gave him the deal and he (so far) has no issues.....
That all said IMO the owner is a jerk....has no feel for the players/coaches.....The kid is going to be a work horse and never get close to a ring.......at least he's going to cash in.