He switched to a face-balanced putter and slowed his swing tempo.
“It finally got through my thick skull,” said Horschel after finishing with three straight birdies for a 4-under 66. “That's been great.”
Coming off four straight missed cuts, Horschel now finds himself in the final group on Sunday, one stroke behind James Hahn.
“It was a really good day of golf,” Horschel said. “Obviously I haven't been in this position in quite some time, so it's nice to play a solid round of golf.”
“I've been in plenty of final groups before,” he said. “I've had plenty of chances to win. I know what the feeling is going to be like. I'm excited to … have a late tee time.”