Not Now Carolyn ($4.80) was passed by Mapit in the stretch of Sunday's second race and then fought back to claim a nose win over the 12-1 outsider at the wire.
Not Now Carolyn ended a seven-race losing streak dating back to January 2016. The 5-year-old mare is trained by Keith Desormeaux and was ridden by his brother, Kent.
Mapit, 3, started outside of her age group for the first time on Sunday. She beat maidens at Santa Anita in late January.