The Saving Private Ryan star has been in and out of the media for years due to his problems with substance abuse and addiction.
It unfortunately seems like Sizemore is in more hot water after it was revealed a stuntman from the US show Shooter is suing the actor for allegedly hitting him with a car while under the influence.
Stuntman Steve de Castro on Saturday filed the lawsuit, which seeks damages and medical expenses from Sizemore as well as the production company Paramount Pictures after he was hit with and then pinned under an SUV in July.
The lawsuit alleges Sizemore knew he was "intoxicated" before taking the wheel of the car and allegedly running de Castro over.