Tom Brady admits he never imagined his son, Jack, would follow his footsteps and have a football career ... but he says watching his 15-year-old compete is "one of the great highlights in my life."
Jack -- Brady's son with actress Bridget Moynahan -- is currently playing high school ball as a free safety and quarterback (go figure) ... and while there could be a TON of pressure having the GOAT for a father, the Buccaneers superstar says that's not the case.
"I don't give a s*** how well he does," Brady said on his "Let's Go!