Halo 3 Help - Starting Again?

[Joe J]

I've been away for 2 weeks and my lil brother the lil sh*t has been playing on my halo 3 and losing all the time. is there any way i can erase everything and start again?

 

[Gabriel B]

You have to make a new gamertag, if not just bring you wins, and losses up by your self.

 

[mrcuddly77]

No. You have to either keep playing or make a new gamertag and start over.