Between 2007 and 2009 she was named three times as an NFHCA All-American while playing field hockey for Michigan State Spartans.

[2] In 2006 Deacon also played for Old Alexandra in the Irish Senior Cup final, losing 1–0 against Hermes.

[1][9] She majored in Civil Engineering and played for Michigan State Spartans in the 2007, 2008 and 2009 NCAA Division I Field Hockey Championships.

In 2012, along with Chloe Watkins, Dora Gorman, Anna O'Flanagan and Deirdre Duke, she was a member of the UCD team that defeated Loreto 3–2.

[16][17] UCD where finalists again in 2013 but this time Deacon finished on the losing side as they lost 3–2 to Railway Union.

Her teammates on this occasion included Anna O'Flanagan, Deirdre Duke, Nicola Evans, Katie Mullan, Emily Beatty and Gillian Pinder.

[19] The 2013–14 season saw UCD and Deacon complete a national double after they also won their first Women's Irish Hockey League title.