The Tampa Bay Buccaneers will be the worst team in the NFC South this year, if Football Outsiders' early projection can be believed. Aaron Schatz's early analysis has the Bucs finishing with a 6-10 record, despite the fifth-easiest projected schedule in the NFL. Note that this is a statistical model, albeit an imperfect one and not their final model. It's not based on anyone's personal analysis.
Now, this is just a rough, early projection and their final analysis will be more detailed. But I wouldn't expect it to change much, especially given the fact that Football Outsiders' statistical models are very much down on Jameis Winston.