[2] While playing for the Hurricanes, Howarth was named Second-Team All-ACC and the NCAA Division I All-Southeast Third Team in 2011.
[citation needed] In April 2013, Howarth signed a professional contract with the Boston Breakers of the National Women's Soccer League after training with the team.
[4] She made her professional debut for the team on May 4, 2013, in a match against the Chicago Red Stars in which she came on as an 89th-minute substitute for Sydney Leroux.
[6] After a season with the Boston Breakers, Howarth returned to the Mutiny to captain the team.
[citation needed] In 2019, Howarth was also named Player of the Year, where she scored in every game she appeared in.