As a 16-year-old high school student, Vidali represented the United States at the 1968 Summer Olympics in Mexico City.

[1] She received a silver medal for her second-place performance in the women's 400-meter individual medley (5:22.2), finishing behind U.S. teammate Claudia Kolb (5:08.5).

[2] Four years later, she won a bronze medal in the women's 200-meter individual medley at the 1972 Summer Olympics in Munich, Germany.

[3] In Munich, she also competed in the 400-meter individual medley and the 100-meter breaststroke, but finished out of medal contention in both events.

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