Ball bolsters the Terps defense after four years at Rutgers.
The Terps had high expectations entering the 2023 season, but their talent never coalesced as they fell in the first weekend of NCAA tournament play.
The Terps were outscored 7-3 in the second half.
The Terps will play for their fifth Big Ten championship after outscoring the Scarlet Knights 10-1 in the first half.
Ahearn has helped the Terps notch the third-best draw percentage in the nation.
The Terps will face Rutgers Thursday for a spot in the Big Ten tournament championship.
The Terps scored just two second-half goals in Saturday's loss to the Wildcats.
The Terps were outscored 9-2 in the second half.
The Terps won the draw control battle against the Buckeyes 19-10 on Saturday.
Shaylan Ahearn, Brianna Lamoureux, Hannah Leubecker, Libby May and Emily Sterling plan on playing for the Terps next season.