He should just get completely shredded lean, go for the Jason Statham Transporter look, no sense in walking around droopy muscle-skinny-fat. Train like an athlete, run/swim/bike, light weight training. Completely reinvent himself. This should be the mission of all pro's once they retire, yet you still have guys like Cutler trying to hang on to muscle, walking around with bloofy arms and sausage tits.