Unless Hock gets hurt. He will have a long pro bowl career. Can't say the same for Fant. Fant could be several teams by the time he's done. Hock might go to one or two. And for top dollar.
Either way I think you are going to see more players get there money and get out of the game by retiring early. Making $100 million isnt worth it if you think you are taking too many head shots. $20 million should do.
I looked up that TJ has $19 million guaranteed for 4 years. After I saw that first concussion he sustained, and I have had a couple of bad concussions, playing only 4 years and really investing your money well in a good mix of funds, real estate, a business of your interest sounds like better than Jason Witten types coming back for their 80th year in the league.