Collin Morikawa uses birdie run to grab PGA Championship lead

(Photo credit: Clare Grant-USA TODAY Sports)

LOUISVILLE, Ky. -- Most of the attention surrounded the surreal Scottie Scheffler situation heading into the second round of the PGA Championship on Friday at Valhalla Golf Club. But on the course, it was Collin Morikawa who stole some of the headlines.

The two-time major champion started at No. 10 and birdied five straight holes on the front nine before making a bogey on his