Davis Thompson capped a roller coaster of a back nine at Torrey Pines with a birdie to take the lead Friday in the Genesis Invitational. Scottie Scheffler had an unusually wild day off the tee and was right on his heels. It set up for a compelling weekend in this $20 million signature event with two names leaping off the pages of the leaderboard — Scheffler, playing bogey-free despite hitting only five fairways, and Rory McIlroy showing the form that led him to victory at Pebble Beach.