Johnny Manziel hit Colleen Crowley so hard that it ruptured her left eardrum, Crowley's attorney told Dallas-Forth television station KXAS-Channel 5 on Monday.
"They expect (the ear) to heal, but it'll take a while," attorney Kathy Kinser told KXAS.
Kinser said Crowley still could not hear out of the ear.
Manziel is the subject of a criminal investigation into the alleged assault that took place in the early hours of Jan.