Bettingzone's headline tip Phil Mickelson is a top-priced 11/8 favourite with Hills to win the US Masters after finishing the third round tied for the lead with Chris DiMarco.
Mickelson carded a bogey-free 69 while DiMarco, 7/2 with Sporting Odds, came in with a 68 as the pair ended the day on six-under-par.
Ernie Els is third favourite at 11/2 (Sporting Odds) after a 71 left him three back at three-under.
After Justin Rose collapsed to a third round 81, the European charge is being led by Paul Casey on four-under. The Englishman fired a superb 68 and is 10/1 at Blue Square and Hills to become the first player to win on his Masters debut since Fuzzy Zoeller in 1979.
European Ryder Cup skipper Bernhard Langer and South Korea's KJ Choi are level on three-under alongside Els. Langer is 20/1 at Bet365 while Choi is the same price with Blue Square.
Tiger Woods finished the day nine back after a 75 and is 100/1 with Bet365 and more than twice those odds on Betfair.