Ariya finished two strokes ahead of Argentina’s Martina Gavier, who shot a 68 in round two at the University of Notre Dame’s Warren Golf Course.
American Lizette Salas finished third with a 4-under 138. Two other players, Brittany Altomare (3-under 139) and Emily Tubert (1-under 141), broke par.
Kimberly Kim led after Monday’s first round with a 66, but shot 78 Tuesday. She still qualified for match play, which includes the top 64 players from stroke-play. The first-round of match play begins Wednesday.