not if he weighs 300lbs he cant... that'd be 3lbs a week of FAT... ya yah, i know, i am being a prick.. but you dont know what kind of condition the guys metablism is in, is he shut down? is deconditioned? whats his current diet look like?
gotta get more info, i think he can probably do it BEST CASE SCENARIO but ya gotta know the details, Mon.