Mayhem At Rob Gronkowski's 'Gronk Beach', Fighting Mascots, All Out Debauchery!

Rob Gronkowski's pre-Super Bowl party wasn't your run-of-the-mill shindig with some dancing and drinking ... several mascots rushed the stage, havoc was wreaked, and people were slammed by two former WWE Superstars!

Gronk Beach, which was put on by Wynn Nightlife and Medium Rare, went down Saturday afternoon at Talking Stick Resort in Phoenix ... and the day started out relatively normally. Rob took the stage shirtless and shook his ass as the jam-packed ground danced and enjoyed themselves.

Then, like an Allstate commercial, mayhem arrived in the form of a couple of mascots who pushed their way on stage.

Good thing TMZ Sports' own Mojo Muhtadi and Samuray Del Sol, formerly known as WWE Superstar Kalisto, were on hand to restore (😏) order. Mojo and SDS began slamming unicorns and gorillas, as bodies were strewn across the stage.

SDS even hopped up on an elevated platform and hit a backflip ... as Rob looked on, very amused.

Before unicorns started flying around, we talked to Gronk and asked him if Tom Brady's retirement shut the door on any potential comeback. Gronk joked he could come back as a kicker.

"If I make the kick tomorrow for Fan Duel. Jerry Jones is gonna call me and I'm going to the Cowboys."

If you haven't heard, Gronk will attempt a 25-yard field goal (a commercial will air the "Kick of Destiny" in the 3rd quarter), and if the future Hall of Famer can knock down the FG, bettors will split $10 MILLION!

And, the guy looks like he could still play (tight end, kicker, DE) ... Rob's jacked.

Although, he got a little bit of help ... we have photos of Gronk at Emsculpt's booth for some TLC on the ol' six-pack!