The Met Gala ain't just for the Kardashians ... a bunch of athletes were there too -- from Tom Brady to Cam Newton ... even a huge NASCAR driver! 

The New England Patriots were well represented with Tom, Julian Edelman and Danny Amendola -- and Alex Rodriguez and Jennifer Lopez killed it. 

Cam Newton wasn't much of a talker -- but his outfit was loud as usual.

La La Anthony made a solo statement ... and keep a lookout for Jeff Gordon and Roger Federer.

Not too shabby ...