Greg Chalmers is determined to prove he can bring his Australian form to the US PGA Tour as he lines up for a rare start at Torrey Pines.

The 41-year-old lefthander is playing his first tournament since winning the Australian PGA Championship in December, when he beat Adam Scott in an epic seven-hole sudden-death playoff.

Stuck in between the main tour and the secondary web.com tour after narrowly missing the US PGA Tour playoffs last year, Chalmers must make the most of limited starts in 2015.

He has been given a late lifeline into the Farmers Insurance Open this week thanks to a handful of withdrawals, including fellow Australians Steven Bowditch and Scott Gardiner.

He intends to cash in.

“I initially pencilled this tournament in and thought I would be in it but I was worried when I was so far down the alternate list, so now I feel very fortunate and am playing with house money to an extent, Chalmers said.

“I have had a great break and, while I am still living off the win back home as much as I can, ultimately it is not going to matter so much on Thursday morning.”

Chalmers, now a two-time winner of both the Australian Open and Australian PGA Championship, has often performed well at home but hasn’t claimed victory in any of his 365 US PGA Tour starts.

He was second at the Kemper Insurance Open in 2000 and the 2009 Buick Open but has failed to get over the final hurdle.

Of the current active players only American Briny Baird (379) has played more events without a win.

“No question it is now about showing I can compete with the same success out here,” Chalmers said.

“It is certainly part of my career I look at now and I’m not content with.

“I have thought long and hard about it many times and sometimes it just takes being honest with yourself so we will see how that honesty helps as this season plays out. “