Here’s how Dustin Johnson made a quadruple-bogey 8 at AT&T Byron Nelson

Dustin Johnson had a bunch of birdies in his opening nine at the AT&T Byron Nelson, but an ugly quadruple-bogey 8 on the par-4 sixth could prove rather costly for the big-hitting nine-time PGA Tour winner.

Johnson entered the final round of the Texas tourney at 11-under -- just two shots back of 54-hole leader Steven Bowditch and in a five-way tie for second. He began his day by chipping in for birdie on the first hole. Another chip-in on No. 3 put him in a tie for the lead, and then came the 448-yard sixth.

DJ lost his drive out of bounds to the right, forcing him to re-tee. His next shot found the knee-high hay on the left and it took him two chopped shots to get out.

He reached the green in six, two-putted for the dreaded snowman, bounced back immediately with another birdie on the par-5 eighth, and made the turn with a 1-over 36.

Heading to his back nine, Johnson was at 10-under, four behind Bowditch.