The Dallas Morning News reports that a misdemeanor court judge sentenced him to 180 days in jail Thursday but suspended that and gave him probation instead.
Whitney Fox, the 23-year-old drunken-driving suspect, was not charged with any crime.
Prosecutors say Perez threw Fox face-first into a concrete highway divider when she struggled after being handcuffed.
The incident was recorded on dash-camera video and by a tollway camera.
Perez retired in Oct. 2009 before being discharged for misconduct.
He apologized to Fox and shook her hand after the court hearing.