Porter, 33, was arrested by the California Highway Patrol early Saturday in a fast-food restaurant parking lot in Bakersfield on suspicion of drunken driving. He also was accused of assaulting an officer and resisting arrest.
Porter's allegation that he was struck is being investigated, Sgt. Larry McGuire said Tuesday, according to the Californian.
McGuire said there is no internal affairs complaint or investigation against Officer Jeritt Greer, who arrested Porter, the newspaper reported.
According to the CHP, Porter refused to provide his driver's license and began to raise his window when asked to leave the car. Police say that when an officer reached to unlock the door, Porter slapped the officer's hand.
Porter's attorney, Daniel Rodriguez, denies that Porter slapped the officer's hand and challenged whether Porter was legally under the influence of alcohol, according to the Californian.
Porter's results on a blood alcohol breath test were .07 and .08, but the test has a margin of error of .02 percent, Rodriguez said, according to the report. The legal limit in California is .08.
In a statement issued Saturday, the Cardinals said the team was aware of the arrest and in the process of gathering all of the facts concerning the incident.
Information from The Associated Press was used in this report.