Harbor attended Maryland men's basketball's game against Illinois in College Park.
The Terps also picked up a commit in football and two in baseball.
The graduate transfer almost decided not to use her remaining year of college eligibility before making the switch to College Park.
The Terps notched back-to-back conference wins to end the year, but still didn't qualify for the Big Ten tournament.
The Terps's 2023 class is ranked No. 9 by ESPN, and a host of other programs announce signees that are set to join teams next year.
Freshman Ava Morales scored two goals, including the game-winner.
The Terps were already eliminated from Big Ten tournament qualification, but claimed their second conference win of the season over the Hoosiers.
Alyssa Poarch, Malikae Dayes and Mikayla Dayes all played in their final home game at Ludwig Field as Maryland players Sunday.
The Terps were unable to notch an equalizer in the second half in the loss.
The Terps suffered their worst loss of the season.