Deadline reports that Sundquist was filming a stunt that involved transferring from one vehicle to another.
Last year, Sundquist sued CBS Corp. and CBS TV Studios for another accident, claiming he was struck by a vehicle during a stunt sequence.
“We have learned about an injury to stunt coordinator Justin Sundquist that occurred late Monday on the set of MacGyver in Atlanta,” CBS TV Studio said in a statement to Deadline.
Though he was conscious after the accident, he’s since been put into a medically induced coma due to the seriousness of his head injury.