Rob Gronkowski Shaves Head at 'Buzz for Kids' to Support Children with Cancer

To most of the world, Rob Gronkowski is known for his wild side, but at Gillette Stadium on Sunday morning, the New England Patriots star showed us something else.

The tight end and his brother, Gordie Gronkowski Jr., shaved their heads to support kids with cancer at "Buzz for Kids."

The before and after. 

Gronk even helped out after he was done.

According to buzzforkids.org, "The One Mission Buzz Off is a fun and unforgettable event where people shave their heads in honor and support of kids with cancer; kids who don't have the choice to lose their hair."

[Twitter, Vine, Buzz for Kids]