I admit, for a human, he is top notch, but face facts, John is better, besides, if he was younger, Marcus would be eye to eye with John. But John does well for a 50 year old man!!!!!!!!!!!
Age doesn't matter, well...., you got admit most 50 year old men are putting up Christmas lights right now, Master Chief on the other hand, is using the heads of Grunts as ornaments. In my book they both deserve more than what they get, but watching your friends and family get torn to pieces by the Locust Horde is the kind of thing that would make me want to kill every single one of them.