Who will have a longer 'PRODUCTIVE" career?

Rick

Mahomes and thats mainly because he would be most likely be the only of these 4 to be able to transition to more of a traditional quarterback style and survive. The other three I don't know if they're will be able to adapt as they get older and can't rely on running as much.

Derrick McQuinn

Mahomes will. He’s already had to deal with injury and will adjust as time goes on. Plus he’s got the arm of a shortstop which is better than scrambling around. So his pocket presence will get stronger too.