Tiger Woods and his son, 11, were on the practice range together at the PNC Championship, and social media was blazing with how good Charlie's swing looked, right down to the club twirl.

What got the attention of Justin Thomas was competitive chirping. He recalled a putting contest they had two years ago in Woods' backyard. Thomas said it was one of the few weeks he occupied the No. 1 world ranking. "Charlie was leading going into the last hole," Thomas said.