Skyler Cassity is the youngest defensive coordinator in the FBS. He didn't take any shortcuts.

Skyler Cassity’s football career ended in an Atlanta doctor’s office during a routine physical before his junior year of high school.

He was born with pectus excavatum, a common condition where the breastbone sinks into the chest, causing a concave appearance. Usually, it’s harmless. But Cassity’s worsened during his growth spurt so his heart was now wedged between his sternum and spine. He needed to have surgery and quit football. Doctor’s orders.