Adam Scott is making a serious run up the leaderboard early in the second round of the World Golf Championships Cadillac Championship at Trump National Doral.

The world No.5 was four under on his round through nine holes to move to six under for the tournament, tied third and just four off the lead still held by overnight pacesetter JB Holmes.

Holmes was 10-under par through just two holes of round two to lead by three over fellow American Charley Hoffman at seven under while Scott joined Ryan Moore in third.

Scott, playing in his first event for two-and-a-half months, jumped out of the blocks with a birdie on the 10th hole, his first.

But his scrambling on the next two holes enabled the Queenslander to stay on track, making a clutch 21-foot par saving putt on the 11th and then recovering from a water bound tee shot on the 12th with another par.

Scott’s transition to the short putter continues to be working wonders with the flat stick firing so far.

A 13-foot birdie putt landed on the 14th and, while he missed a chance from 12 feet on the following hole, he didn’t miss opportunities on 16 and 17 to continue his charge.

John Senden was the next best Australian at even par in a tie for 19th while Steven Jeffress and Geoff Ogilvy sat two-over early in round two.

Jason Day, trying to fight back from a disastrous round one, remained three over and Greg Chalmers four over to finish out the Australian tilt.