2015 Masters odds: Jordan Spieth the overwhelming favorite to win the green jacket

After following up a first round 64 with a 6-under 66 on Friday, Jordan Spieth is well ahead of the field heading into the weekend at the 2015 Masters. His five-stroke lead has inspired oddsmakers to install him as a 4/9 favorite heading into the third round, according to Bovada.

Spieth was nearly flawless through 36 holes, carding 15 birdies and just a single bogey. He was among the betting favorites coming in, starting the tournament with 9/1 odds, but he’s only risen since. He was a 7/4 favorite after a sizzling first round and the strong follow up has him a dominant favorite to win and for good reason. According to Justin Ray of Golf Channel, only three players held at least a five-stroke lead through 36 holes at Augusta. All three went on to win the green jacket.

It will be an uphill climb to catch Spieth -- and barring a meltdown it seems like unlikely -- but oddsmakers pegged Dustin Johnson as the second-most likely to win. He is among three players tied for third place at 7-under and that was good enough to earn 8/1 odds to win. Johnson set a Masters record with three eagles in one round on Friday, so he can certainly pick up strokes in a hurry.

Justin Rose and Charley Hoffman have the next best odds at 14/1 and 16/1 respectively. Hoffman will begin the third round in second place, five strokes behind Spieth. Phil Mickelson sits at 18/1 while pre-tournament favorite Rory McIlroy is 33/1. Former Masters champions Adam Scott, Bubba Watson and Tiger Woods are all 66/1 to win.

Here is a complete look at the odds through 36 holes (via Bovada):