Leishman shoots 61 in debut of new course at Byron Nelson

Keith Mitchell hits from the first tee off during the first round of the AT&T Byron Nelson golf tournament Thursday, May 17, 2018, at Trinity Forest i

Keith Mitchell hits from the first tee off during the first round of the AT&T Byron Nelson golf tournament Thursday, May 17, 2018, at Trinity Forest i

Jordan Spieth watches his shot from the ninth tee during the first round of the Byron Nelson golf tournament at Trinity Forest in Dallas on Thursday,

Jordan Spieth watches his shot from the ninth tee during the first round of the Byron Nelson golf tournament at Trinity Forest in Dallas on Thursday,

Sam Saunders watches his tee shot on No. 14 during the first round of the AT&T Byron Nelson golf tournament Thursday, May 17, 2018, at Trinity Forest

Sam Saunders watches his tee shot on No. 14 during the first round of the AT&T Byron Nelson golf tournament Thursday, May 17, 2018, at Trinity Forest

DALLAS (AP) — Marc Leishman shot a 10-under 61 on the new links-style Trinity Forest course to take the first-round lead Thursday in the AT&T Byron Nelson.

Jordan Spieth was eight shots back in his hometown event, which returned to Dallas after 35 years at the TPC Four Seasons in suburban Irving. Defending champion Billy Horschel shot 68.

Leishman opened with an eagle, started the back nine with three straight birdies and reached 9 under with another eagle at the 14th.

The 34-year-old Australian, a three-time PGA Tour winner, had chances to go lower but settled for a 10-foot birdie putt at the par-3 17th for the lowest round of his PGA Tour career. He was a stroke shy of the Nelson record.

J.J. Spaun and Texan Jimmy Walker shot 64. Spaun had six birdies in a span of seven holes for a 30 on his second nine — the front nine on the undulating layout with no trees or water hazards a few miles south of downtown Dallas.