Duncan tied for 25th after opening round 68

McKINNEY, Tx. — Tyler Duncan carded a 4-under-par 68 in Thursday’s opening round and is tied for 25th place in the AT&T Byron Nelson.

Duncan, a 2008 Columbus North graduate, shot even-par 36 on the first nine and 4-under 32 on the back at TPC Craig Ranch.

Sebastian Munoz leads the tournament at 12-under 60, which set a new course record.