Penn State opened the scoring in the 57th minute on Hayes' 16th goal of the season.
"They did a better job than we did in the middle of the field," Florida State coach Mark Krikorian said. "They won more first ball and won more second balls. But we did pick up the pace in the second half and put a lot of pressure on them, but didn't finish enough of our plays."
Nairn helped set up the goal, leading a rush up the middle and feeding a pass to Mallory Weber on the left wing. Weber came in and fired a left-foot shot at Wys, who made the initial save, but dropped the ball. Hayes was right there to knock it into the far right corner with her left foot.