Kilgore was booked into the Kingsport City (Tenn.) Jail and later was released after posting a $250 bond.
A police officer stopped Kilgore and his friend Brandon Thompson in the lineman's hometown of Kingsport after smelling alcohol on their persons and noticing "red eyes and dilated pupils" as the pair walked down the street.
In the police report, the officer states that Kilgore and Thompson "were too intoxicated to be in public." They both were arrested "for their safety and the welfare of the public."
Kilgore was drafted in the fifth round by the 49ers in 2011 and has appeared in every game for the team the past two seasons.