I wouldnt say DEN. The D is legit and those guys usually dont "give up" on a season. And Trevor was the best QB DEN had this year and hes playing for a job now. And WRs are whores and will still put up numbers.
I think people are confused. The OP didn't ask for bad teams, it asked who has given up. Huge difference. SF plays their asses off every week. They just aren't good. Someone mentioned KC. Haha they are still in 1st place. Yep clearly time to mail it in.