Ben Martin chips into the hole for an eagle on the 11th hole during the second round of the Zurich Classic golf tournament at TPC Louisiana Friday in Avondale, La.

AVONDALE, La. — Ben Martin shot a 5-under 67 on Friday to maintain a course-record pace at TPC Louisiana, keeping him atop the leaderboard through two rounds of the Zurich Classic.

After breaking the course record with a 62 on Thursday, Martin opened the second round with two birdies and an eagle on his first four holes. He shook off a bogey and double bogey on successive holes in the middle of the round and birdied four of his last nine to move to 15 under — the best 36-hole total at the course. No one has had a four-round score better than 20 under.

Andrew Svoboda shot a 68 to remain second at 12 under, but closed his round on the par-3 ninth with his first bogey of the tournament.

Robert Streb (66) and Sueng-Yul Noh (68) were 11 under, and two-time heart transplant recipient Erik Compton (68) and Peter Hanson (69) were another stroke back.