After ranging into contention with a four-wide move on the turn, Sapphire Sky took charge turning for a home-a move that surprised jockey John Velazquez.
"All of a sudden, man, did she start running," Velazquez said. "I thought it was way too soon, but at that point there's nothing you can do. You just keep her going forward and she responded."
All three career wins have come on wet tracks. Sapphire Sky is winless in five tries on a fast surface. She ran the seven furlongs in 1:24.19, capturing the richest race of her career in the stakes for 3-year-old fillies bred in New York.
Sapphire Sky paid $10.40, $6.30 and $4. Ampart Ridge got second, returning $11 and $5.60. Karakorum Fugitive paid $2.90 to show.
Ouchy Night was fourth followed by even-money favorite What a Pear, More Oats Please, Goodday, La Concerto and Yo Karakorum.