Johnson started all 20 games of her junior year in 2011 and scored the fasted goal in program history, 14 seconds into the match.

[4] In the final match of her senior year, Johnson scored the game-winning goal in a 2–1 win over rivals UCLA Bruins.

[3] In March 2014, Johnson joined the Chicago Red Stars in the National Women's Soccer League for preseason, after attending their 2014 Open Tryouts.

[11] On June 16, 2018, Johnson along with teammates Sofia Huerta and Taylor Comeau were made unavailable for the Red Stars match due to a pending trade.

[20] In November 2020, Johnson decided to return to the game, signing with Australian W-League club Melbourne City.

[30] Johnson was named to the roster for the 2008 FIFA U-17 Women's World Cup, where the United States finished second after losing in extra time to North Korea in the Championship game.