Together with Rena Buckley, Nollaig Cleary, Briege Corkery, Juliet Murphy, Mary O'Connor and Angela Walsh, she was a prominent member of the Cork team, winning ten All-Ireland medals, ten Munster titles and nine League titles.
[14][15] While attending the University of Limerick, Mulcahy was chosen to represent Ireland at the 2003 Summer Universiade.
Mulcahy came on as a substitute to score an 86th-minute goal in a 1–0 win against Shamrock Rovers at Tallaght Stadium.
After retiring as an inter-county Ladies' Gaelic footballer in 2015, Mulcahy subsequently joined Cork City for the 2016 season.
She announced the decision to coincide with her taking part in the Donal Óg Cusack/RTÉ documentary, Coming Out of the Curve.