Jason Day shot a brilliant, third-round 66 at Shadow Creek today to move into the mix at the PGA Tour's CJ Cup.

Less than a month out from the Masters at Augusta National, Day has found some encouraging form in Las Vegas this week.

Today he made six birdies and a chip-in eagle at the short par-four 11th hole to move up to 10 under par, just five shots from the lead through three rounds.

Short-sided at the 11th, his Mickelsonesque flop shot landed like a butterfly on the edge of the green and trickled down into the hole, a highlight of the round.

Day, 32, has not won a tournament in more than two years but he has set himself for the Masters, where he has a good record -- runner-up in 2011, third in 2013 and fifth last year.

Another Queenslander, Cameron Smith, shot 68 today to be just outside the top 20 as he, too, prepares for Augusta. The Masters is from 12-15 November.

Russell Henley of the United States leads at 15-under.

CJ Cup leaderboard