McKINNEY, Texas (AP) — S.Y. Noh has a three-shot lead at the AT&T Byron Nelson after he tied the course record with an opening-round 60. Noh decided against going for the green in two on the par-5 18th. He made birdie and finished at 11-under even after dealing with a cracked driver on the back nine. Sebastián Muñoz set the TPC Craig Ranch record last year with a 12-under opening round. The course is now a par 71 in its third year of hosting the Nelson after one of the par-5s was converted to a par-4. Two-time defending champion K.H. Lee of South Korea shot 71. Local favorite and world No. 2 Scottie Scheffler had a 64.