There is no objective measurement for that. He turns 29 later this year. Not exactly a spring chicken. There are similar players available at younger ages that don't cost $14m per year.
He’s one of the few players on this team that earns and deserves the contract he is paid. Fitz is 2nd on that list, and mainly because of his steady performance, loyalty, and consistency as an offensive football player. PP is a value/valuable player.
...I’ve been watching the forum for the past couple weeks, about every 1-1.5 hours; you guys thinking it’s a good idea to trade Rosen are on dope. No Effin way