This comes as a surprise to some but little did many know, his father, Tom Harmon, was a Heisman Trophy winner and broadcaster. Mark played football when he attended Los Angeles' Harvard School ...

Rodriguez/Getty Mark Harmon wasn't originally too fond of his ... show hosts that his first role was actually beside his father, football and broadcasting icon Tom Harmon. The NCIS star explained ...

Mark Harmon was a quarterback for UCLA ... sure that everyone was working together as a cohesive unit, much like how football players need to jive together as a team. Rocky Carroll continued ...