She was the starting goaltender for the United States women's national ice hockey team when they won the gold medal at the 2018 Winter Olympics.

[1] In her senior year of high school, Rooney switched from the girls to the boys varsity team and finished the season with a .910 save percentage.

[6] At the age of 19, Rooney won a gold medal at the 2017 IIHF Women's World Championship as a backup goaltender.

She helped lead Team USA to the gold medal by winning the shootout in the final against Canada by a score of 3–2, stopping Meghan Agosta in the sixth and last round to end the game.

[9] On January 2, 2022, Rooney was named to Team USA's roster to represent the United States at the 2022 Winter Olympics.