"Nine under is incredible with U.S. Open pressure", Miller told Golf Channel's Ryan Lavner.
He was at 8 under at the end of the day, and never got back to double digits. A day after Rickie Fowler's seven-under opening round, that same score is still leading, but it's shared by four players, not including Fowler, who shot a one-over 73 to sit one back.
"It was a good bogey though", joked Fleetwood, who regained his composure to hit a superb pitch from well below the putting surface. Gaining nearly as much attention as his round was Thomas' pink trousers. He had 310 yards to the hole when he hit 3-wood that could have led to big trouble if he went too far long or left.
On Saturday, Justin Thomas tied the record for the best round at a major by shooting 63.
But I can't do that yet because I haven't figured out the other part.
"Not every day you enjoy a round of golf with an eight on the card, but I'm a pretty happy man", Casey said.
"It's been the best preparation going into a major, I felt like, in my career, which is playing in majors and knowing what I needed to do to prep for a tournament such as this", Day said.
"I've shown what can happen with one bad swing".
And he still has a long way to go.
Thirty-two players had sub-par rounds on Saturday, the most ever for the third round.
Koepka also reached the green in two on the 667-yard closing hole for a two-putt birdie and a 68.
Bill Haas played bogey-free in his round of 68 and joined a group at 4-under 140 that included Harris English (69) and Marc Leishman (72). He was 10 under. "Doing it all night is not going to help and not make any difference, let's just concentrate on each day as it comes", he said. "I'm looking forward to my shot at it". I've been there a handful of times and had some good finishes.
Fleetwood and South Korea's Si Woo Kim are the only non-Americans in the top 13.
Casey flew the back of the green with his third shot and finding deep rough but could only move his ball some six inches.
Even with the course drying out, there simply was not enough wind to frighten anyone on their game. "And I've been very light on competitive rounds this year, and it's just a matter of getting into a good round of golf now". He followed with a victory at the SBS Tournament of Champions in January, then shot 59 en-route to another victory at the Sony Open in Hawaii the following week.
American Patrick Reed also flirted with the US Open record, signing for a seven-under 65 to headline a pack of five at eight-under. He failed to get up-and-down from behind the 17th green, and then he three-putted from 40 feet on the final hole to finish at 8-under 272.