Brandon Marshall thinks moving the Raiders to Sin City is a commitment to disaster ... saying Vegas will DESTROY young players who won't be able to resist unhealthy temptations.
We got the NY Jets WR on Capitol Hill -- dude was doing more great work on mental health -- and asked what he thought of the Raiders possibly bolting NorCal for the desert of desire in Las Vegas.
Raiders owner Mark Davis has been vocal about his plans -- and some think it's just a matter of time before it really goes down.
Check out the clip -- Marshall says he doesn't think Vegas is a bad place ... but it's just too much for young people "fresh out of school with a lot of money."
Think about it ... how long would YOU last as a 21-year-old in Vegas with $20 mil in your bank account?
Yeah, thought so.