A bit random, but on twitter the lead singer Tyson Ritter said that he had walked out on the guitarist Nick Wheeler, who said on his twitter that he was done with Tyson's bull shit and was out forever.

Does anyone know if they have split or not?

Well I'm pretty sure there is no better source than the band members themselves!

hope not!!!
love all american rejects!
great band live too!

I know! Every single one of their songs have been fantastic! And they make the best music videos! But I know Tyson can be a bit of a nob. But they are the best band! And AMAZING live!