McKINNEY, Texas (AP) — Scottie Scheffler has a one-shot lead over fellow Texan Ryan Palmer and Canadian Mackenzie Hughes after the second round of the AT&T Byron Nelson. Scheffler has recorded consecutive 7-under 64s. Hughes matched that number in the second round and Palmer shot 65. South Korean S.Y. Noh had a 74 after tying the course record with an opening-round 60. Two-time defending champion K.H. Lee made the cut on the number at 4 under. But the South Korean’s bid to become the first player in 12 years to win a tournament three consecutive times is in jeopardy.