Jon Rahm brushes off Brooks Koepka's 'act like a child' jab

(Photo credit: Rob Schumacher, Rob Schumacher / USA TODAY NETWORK)
Jon Rahm said he has no issue with Brooks Koepka, even though the latter accused him of acting "like a child."

Koepka's comment came on the heels of Rahm venting a bit of frustration after he left a 10-foot putt short on the 17th hole Friday in the Ryder Cup at Marco Simone Golf and Country Club near Rome. Rahm, 28, let loose by hitting one of the signs h