Why did Dwayne Johnson gift Rob Gronkowski underwear?

Dwayne Johnson has formed several friendships across different industries because of his various roles in the business. One of his most famous friends is none other than NFL star Rob Gronkowski.

Bre Tiesi Gifts Nick Cannon Personalized 'Cannonopoly' Board Game

Mariah Carey Admits Her Twins Monroe & Moroccan Have Expensive Taste

my new plaid pants: Who Wolks the Watchmen

my new plaid pants: A Midnight Kiss From Carter

Demi Moore Shows Off Her Curves In Sexy Beachside Thirst Trap

Cher Will 'Never' Accept Invite To Rock & Roll Hall Of Fame After Snub

Dwayne Johnson Bashed For Saying It Was His First Time Trying In-N-Out

Kym Johnson's Husband Robert Herjavec Is 'Supportive' Of Her Career

Why did Dwayne Johnson gift Rob Gronkowski underwear?