The state's two-time returning Gatorade Player of the Year, this 5-foot-6 junior midfielder led the Patriots to a 17-2-2 record and the Division I state championship this past season. McGuire scored 31 goals and passed for nine assists despite missing the first 10 games of the season because of the Rhode Island Interscholastic League's transfer rules. McGuire won the Gatorade award as a freshman at Portsmouth High and as a sophomore at St. George's School in Middletown. An All-American selection by the National Soccer Coaches Association of America, she concluded her junior year with 81 goals and 25 assists in her prep soccer career.
McGuire has maintained a 3.54 GPA in the classroom. She has made a verbal commitment to play soccer on scholarship at Duke University beginning in the fall of 2018.
McGuire has volunteered locally as a youth soccer coach and as part of multiple community-service initiatives with her church youth group. "Marykate McGuire scored 31 goals in half a season; to me, that is just remarkable and unheard of," said Martin Yarumian, head coach of Bay View Academy. "She was the reason the Portsmouth girls took the title again. She is the most dominant and impactful player in the league."