AUGUSTA, Ga. -- It was a tale of two nines for Jason Day.
The top-ranked player in the world shot an opening-round 72 in his first round at Augusta National, as he was derailed with a 5-over 41 on the back nine.
Jordan Spieth grabbed the clubhouse lead with a first-round 6-under 66, and it looked early as if Day was on his way to matching Spieth on the back side. That, however, was from reality.
After finishing 5-under on the front, Day was 5-over par on a three-hole stretch from 15 to 17. In the middle was a disastrous triple-bogey 6 on the par-3 16th, in which his tee shot found the water.
He's six off the lead as he enters Friday's second round, which he'll start at 9:59 a.m.