NASHVILLE, Tenn. -- David Quessenberry could tell something wasn't right when he started to get tired and the workouts got harder.
It was the summer of 2014, and the then second-year Houston Texans offensive lineman was experiencing fatigue, a persistent cough and a feeling he was going to black out during OTAs. A biopsy revealed that Quessenberry had non-Hodgkin's lymphoma.
The devastating news didn't derail Quessenberry from his NFL goals. He just had to beat cancer first.
"No matter what anybody says, I am just going to keep charging. My focus is on being the best football player that I can," Quessenberry said.