Mark Harmon Almost Became an NFL Quarterback Before Joining NCIS!

“Mark Harmon Almost Became an NFL Quarterback Before NCIS Fame!”

Before becoming the iconic Leroy Jethro Gibbs on NCIS, Mark Harmon was poised for a career in the NFL as a quarterback. Best known for his role on the show, which he played for 19 seasons starting in 2003, Harmon recently made headlines with cameos in the NCIS: Origins spinoff, featuring a young Leroy Jethro Gibbs.

What many don’t know is that Harmon’s football background runs deep. His father, Tom Harmon, was a Heisman Trophy winner and broadcaster, which gave Mark a strong football foundation before he turned to acting.