Marc Leishman was on track for a course record in his comeback tournament before bad weather forced a halt to the second round of the Zurich Classic on a good day for Australians at TPC Louisiana.

Leishman, who returned to the US PGA Tour this week after taking a month off to tend to family when his wife became gravely ill, has one hole to play to complete his round on Saturday (Sunday AEST).

He fired a 10-under-par on Friday, needing a birdie on the 18th to set a course record.

With his wife, Audrey, recovering, Leishman came to New Orleans saying he just wanted to “knock off some rust.”

He did a lot better than that and is now in line for a nice pay-day, given officials were estimating the cut line at four under.

“Hopefully, I’ll hole out or get up and down for bogey,” said Leishman, who shot a 74 on Thursday.

“It was a good day, my expectations were pretty much non-existent this week.

“It’s just good to be out there and knock the cobwebs off.

“Today, I hit some good shots and holed some putts and all of a sudden you’re 10-under.”

Leishman’s compatriot Jason Day was six under for the day through 14 holes and sits at 10 under for the tournament, placing him one shot behind American leaders Hudson Swafford and Boo Weekley.

Day is locked in a five-way tie for third while fellow Aussie Steven Bowditch is one shot behind the world No.6 at nine under in a tie for eighth with six players.

Leishman is eight under for the tournament and is one of seven players tied 14th and just three shots off the pace.