Mark Harmon was a quarterback for UCLA, so he has the mentality of team… It's not only what you do on the field and when the cameras are rolling, it's how you relate to each other in the locker ...

Mark Harmon was close to joining the big leagues of the NFL before becoming an actor. The actor is known for his role as Leroy Jethro Gibbs on NCIS, who he played for 19 seasons starting in 2003.

Mark Harmon was a quarterback for UCLA, so he has the mentality of team… It's not only what you do on the field and when the cameras are rolling, it's how you relate to each other in the locker ...