Why is mark harmon wearing a sling?

His character on NCIS is wearing a sling due to pushing Special Agent McGee out of the way of a speeding car and getting himself injured in the process.
Is merle harmon related to mark harmon?

Is merle harmon related to mark harmon?

No. The late sportscaster was not related to the star of television's "NCIS" series. Mark Harmon is the son of the late Tom Harmon, who won the 1940 Heisman Trophy as a tailba