 In 2008 she rejected an offer to join American Women's Professional Soccer franchise Boston Breakers, who failed to match her salary expectations.Byrne was given a free transfer by Arsenal in December 2016 on the expiry of her contract, after being supplanted in the team by Sari van Veenendaal.She agreed to join FA WSL 2 club Brighton & Hove Albion Women for the FA WSL Spring Series.