Antonio Brown - didn’t become a bad player, instability finally whacked him Kenny Britt - come on he never really had a prime, didn’t reach 1,000 yards until his ninth season and that was it Terrell Pryor - that’s a joke right? A single thousand yard season and not another one eclipsing 253 yards. NNandi Asomugha - moves at age 30 and was still a top performer before abruptly ending his career Jeff Garcia - dude entered the league at age 29 of course he was going to eventually fail Adam Archuleta - this may be the closest you got which is an outlier Ahman Green - dB changing teams at age 30, NEXT! DeMarco Murray - he actually played pretty well with all three squads albeit fir brief periods. But that’s why rbs with mileage don’t get big contracts. Overall I think you came up with only one slightly relevant example.