WFAA-TV and KDFW-TV, Dallas, said the player turned himself in after a female family member was assaulted.
Dallas authorities said the alleged victim did not require hospitalization.
KDFW reported Bryant posted bond and was released.
The 23-year-old receiver confirmed to WFAA there had been an incident, but wouldn't comment further.
Bryant hauled in 63 passes for 928 yards, scoring nine TDs for the Cowboys last season.