She previously played with the Markham Thunder and the Dartmouth Big Green and competed internationally with the Canadian under-18 and under-22 teams.

[3] She scored a goal in the gold medal game of the 2011 Canadian National Women's Under-18 Championships for Team Ontario Red.

[4] In the first game of the 2012 IIHF World Women's U18 Championship on December 31, 2011, Stacey posted three points in a 13–1 rout of Switzerland.

Competing with Team White, she was joined by fellow Thunder teammates Laura Fortino, Jess Jones and Rebecca Vint.

[10] In the 2018 Clarkson Cup finals against Kunlun Red Star, Stacey scored with 2:11 left in overtime, giving Markham a 2–1 victory and its first championship.

[24] On May 26, 2023, Stacey announced her engagement to Team Canada and PWHL Montreal teammate Marie-Philip Poulin,[25] with whom she has been in a relationship since 2017.