That was a US Open best in a single round.
Casey nearly watched his U.S. Open hopes sink with a triple-bogey eight on the par-five 14th hole, and a bogey on the next that dropped him to two under for the tournament.
Five players have found themselves with scores of -10 or better through the first 54 holes of the 117th U.S. Open Championship being played at Erin Hills this weekend.
Left behind was the biggest 36-hole logjam in 43 years at the U.S. Open, with four tied at the top. DJ looked very disappointed as he was hoping to defend his title while Day and McIlroy seemed more resigned to their fate.
The Englishman struggled to get out of the knee-high fescue rough at Erin Hills and posted a snowman on the par-5 14th hole, his fifth of the day. "And I know if I go out and play the golf I'm capable of, good things should happen".
"Not every day you enjoy a round of golf with an eight on the card, but I m a pretty happy man", Casey said. Garcia carded an eagle, three birdies and three bogeys in a roller coaster round.
"You don't get many rounds at the U.S. Open that are stress-free", Fowler said.
"Guess what? We get to go home today because Daddy played poorly", Day said to his son, Dash, before walking over to sign autographs. 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. Neither could recover to make the cut Friday, as McIlroy shot 71 to finish at 5-over and Day shot 75 and finished 10-over. That still didn't appear to be almost enough. Reavie had five birdies in a six-hole stretch beginning on No. 11.
"Even though it's very disappointing to not be here on the weekend, I think these last two rounds will serve me well going into the summer", added the 28-year-old, who has added the Scottish Open to his schedule in between the Irish Open and Open Championship.
The last six majors have crowned first-time champions and that trend looks poised to continue at Erin Hills where you have to look way down the leaderboard to 19th before finding a major victor in U.S. Masters champion Sergio Garcia of Spain.
Champ is used to belting the ball a long, long way.
No one took advantage like Fowler.
However, it wasn't all great for some of the guys on the course on Saturday. Even just trying to take my medicine is very, very hard. It's a good eight in the end.
Casey, contesting his 14th U.S. Open, spoke about how his 66 on day one was the best fun he ever had at a US Open and it was the same again yesterday.
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).
The top 60 and ties make the cut at the U.S. Open. It was 1 over at Medinah in 1990.
But there was no hope for Day and McIlroy. He had no explanation or theory on why the top three players in the world would not be around for the weekend - the first time since the Official World Golf Ranking debuted in 1986 that the top three in the world missed the cut at a major. He failed to advance his fourth shot more than a foot as the high grass grabbed the club. "And just unfortunately, this didn't pan out".