A retired businessman enrolled in college for the first time — and joined the D-III football team as a freshman walk-on — after a dire cancer diagnosis reinvigorated his zeal for life. Tom Green, a 60-year-old Maryland native, stunned school officials when he tried out for the football team during his freshman year at McDaniel College. Now, he’s slated to be one of the oldest college athletes in US history, about a decade after beating cancer. When he was first diagnosed with stage four kidney cancer in 2015, Green said he was certifiably “dying.” Tom Green, 60, joined the McDaniel College football team as a freshman walk-on. Fox17 Green will play on the defensive line. Fox17 “I was 60 pounds less, I was sweating like crazy at nighttime, and my blood was being eaten by the tumors. That was my life. I thought it was the end,” Green told ABC 4 . Eight tumors festered in his body, stretching from one in his skull to another in the tail of his pancreas. “I was so far gone.…