"I have to give myself more opportunities at birdie because I feel quite good about the putter", Park said.
And then after a stunning mistake at the 10th tee, she looked as if she were going to join Arnold Palmer in the annals of historic collapses. She rolls the ball beautifully.
Jutanugarn is trying for her ninth LPGA Tour win and her second major.
"Coming off the back of 77 and 79 at Wentworth last week I never really expected this", Slattery said.
Ariya used her prodigious power to muscle her favourite three-wood tee shots past Smith's drives with regularity, and displayed a deft short game in a round that included only one bogey. Karrie Webb and Katherine Kirk are on the cut-line of 4 over but have several holes to play tomorrow morning to move either way, amateur Robyn Choi is at 6 over and finished and appears to be missing the cut and Sarah Kemp also has holes to play but is at 10 over.
The playoff now became sudden death as the two went back to the 14th.
Surprise packet Smith held a three-shot halfway lead following back to back 67s and was second only to 22-year-old Thai star Jutanugarn entering the last round but she shot an ugly six-over-par 78 on Sunday to finish tied fifth.
She righted the ship in the playoff, which went to a sudden-death format after the two-hole aggregate start failed to produce a victor.
Kim made the biggest leap among those in the top 50, after losing to Ariya Jutanugarn on the fourth playoff hole at the oldest major championship in women's golf over the weekend. I think I rushed putting them in.
Ko has stumbled her way through the fourth round at the US Open on Sunday (Monday NZ time) with four bogeys and three birdies to card a one-over 73 at Shoal Creek.
"After you have a seven-shot lead and have to go to a playoff, you kind of have no expectation".
But the drama intensified further when Jutanugarn found the front bunker with her approach and caught her splash-out too heavy, and her 12-foot putt for victory slid past the left side of the hole. Kim birdied the 14th to take the upper hand, while Jutanugarn made par. She is still chasing Smith, along with everyone else.
"I haven't been in the position before, I but I hope to show up like it's another day", Smith said.
Jutanugarn and the other golfers battled rough weather conditions all week at the Alabama course, including a postponement of play Friday that meant both the second and third rounds had to be completed the following day.