Rob Gronkowski Flashes Model Hailey Clauson, Bares His Booty in 'GQ'

NFL star Rob Gronkowski flashes his totally bare body and shows off his butt crack in the new issue of GQ magazine.

Also starring in the feature with “Gronk” is model Hailey Clauson, who is one of the few models to cover both Sports Illustrated and GQ back to back.

It looks like Rob is really enjoying the NFL off-season!

Be sure to check back next week to get the entire story with shirtless Gronk and bikini-clad Hailey!

For more from Rob and Hailey, visit GQ.com.