An errant drive on No. 14 led to a drop, then he had to punch back into the fairway before his approach to the back fringe of the green and a double bogey. His approach out of the rough at the next hole found a greenside bunker and he missed a 7-footer for par.
Bradley was only one stroke off the lead when his drive at No. 11 was way right. His shot from there went over the green and trickled into the water, leading to a triple bogey that took him to 4 under, where he finished.
Mickelson had five birdies and four bogeys for a round of 69. He failed to make up any ground even after holing a 42-foot chip shot at No. 18, where he finished with double bogey Friday.
"It was a fun way to end the day," he said. "I had a lot of opportunities to get right back in the mix and made four or five mistakes there, sloppy bogeys."