Jason Day leads the Australians after his round of 72 today at Pebble Beach saw him lose ground but he is six shots behind the leader and just three shots out of second place so something very special from him tomorrow could yet see him contending for the title.
Teeing off as part of a four-way tie for the lead, Casey jumped clear with a five-under 67 at Spyglass Hill that give him a 15-under total of 200. "It was very hard but I was able to come back when it cleared up".
By making the cut early on Saturday, the five-time major champion has now made 500 cuts in his storied career.
Like a scramble out of the pocket to turn a broken play into a touchdown, Romo lined up his next shot and pulled off what one golf media outlet has already dubbed the shot of the year.
"Conditions are going to be tough", Day said. "Because of that I'm playing better", said Casey, who was enjoying the Pro-Am experience, which can test the patience of the pros - especially with the kind of soaking weather that has further slowed things this week.
Iran marks 40th anniversary of Islamic Revolution
Some demonstrators shouted "Death to Israel, Death to America" - sayings often repeated at the time of the revolution. Israel and Iran have not maintained diplomatic relations since the Islamic Revolution of 1979.
"I stand firm on what I said", Casey said.
It started under a blue sky with patches of clouds that soon took aim at the Monterey Peninsula, dropped temperatures by some 10 degrees and brought enough rain to make it tougher than usual.
Seeking his first victory since 2017, former world number one Spieth - who returned on Saturday morning to complete his second round after rain and wind hit the event on Friday - posted a two-over-par 74 in the penultimate round.
Elsewhere on the course, Jordan Spieth's double-bogey at the 18th dropped him from what would have been a tie for seventh place to a tie for 18th at seven under.