run a risk

run a risk or take a risk  {v. phr.}

To be open to danger or loss; put yourself in danger; be unprotected.

A baseball umpire wears a mask and chest protector so he won't run the risk of being hit by the ball.

Billy takes a risk of being hit by a car when he runs into the street without looking.

I was afraid to run the risk of betting on the game.

Compare: TAKE A CHANCE.