Derek Carr says he doesn't anticipate any issues whatsoever arising from Carl Nassib's gay announcement ... but the QB made it clear, if any do come up, the Raiders will defend their teammate vigorously.

"He's our brother," Las Vegas' star signal-caller said of the pass rusher. "So, if you want to mess with him, you have to go through us."

Carr explained his feelings on Nassib on the "The Cris Collinsworth Podcast featuring Richard Sherman" this week ... and he didn't hold back, speaking very candidly.

The 30-year-old admitted there might be some people in Vegas' locker room that don't agree with Nassib's lifestyle ... but he insisted every single Raider still plans on being there for Carl regardless.