While Browns coach Mike Pettine said that Johnny Manziel would likely remain as their backup quarterback, the NFL could change that by disciplining the player based on violation of personal conduct policy.

The NFL is investigating Manziel for a recent driving incident, but the league could impose sanctions even before it is completed.

According to the policy, anyone believed by commissioner Roger Goodell to be in violation may be placed on paid leave at any time, ESPN reported.

The league's investigation will look into whether there was physical violence or the threat of it and whether Manziel's driving posed a danger to others.

The Commissioner 's decision based on the policy will not reflect a finding of guilt or innocence and will not be guided by the legal standards applied in a criminal trial.

Manziel's girlfriend Colleen Crowley claimed the quarterback hit her and shoved her head against the glass while driving.

She also told police that at one point she feared for her life.

Manziel was stopped by police on Oct. 12 in Avon, Ohio, after witnesses saw him drive at high speed and crossed several lanes to exit the highway. During such time, Crowley tried to leave the moving car but Manziel pulled her back in.

A witness described Manziel as "flying" on the highway while another claimed Crowley told her Manziel had hit her. Crowley did not press charges and later posted on social media that she and Manziel were fine.

Manziel told police they had been drinking earlier. Police determined that Manziel was not intoxicated, and there were no arrests or charges made. ​