NFL Fans Can't Believe How Much Tom Brady's Son Has Grown

Tom Brady might have some trouble beating his oldest in 1-on-1 basketball moving forward.

Brady, 48, has three children, including two with his former wife Gisele Bundchen. His oldest offspring, 17-year-old Jack, is his child from a previous relationship with actress Bridget Moynahan.

Jack Moynahan, who is heading into his senior year of high school, has been described as his dad's "mini-me," but he's anything but small.

In a new set of photos Brady posted on Instagram Wednesday, the Riverdale Country School basketball player is noticeable taller than his famous pops.

NFL fans stunned by Jack's size

Some of Brady's former teammates hopped into the comments section to chide the GOAT about his son being taller than him.

Many NFL fans also can't believe how much the teenager has matured in recent years.

"Is Jack standing on something? Besides business lol," said Tampa Bay Buccaneers star wide receiver Mike Evans.

"Jack is way more beastly than you," added Brady's friend and longtime teammate Rob Gronkowski.

"Wow, Jack is really starting to tower over Tom! Mom and dad created a strong and handsome young man. God Bless????????," one fan wrote.

"@tombrady Tommy, Jack is taller than you?? You guys look great! ????????," another person added.

"Jack's taller than Daddy ????," a third fan said.

Jack Moynahan an athlete in his own right

Jack Moynahan played football early in his high school career, but basketball is more his game.

According to Moynahan's HUDL account, he has indeed surpassed his 6-foot-4 father's height. The shooting guard/small forward is listed at 6-foot-6, 170 pounds.

Riverside Hawks Select, Moynahan's AAU team, recently shared his summer highlights, where he averaged 11 points and 7 rebounds per game in this year's Hoop Group Academic League.

"Jack has turned himself into a highly sought after prospect," the Riverside Hawks post says. "His learning curve for the game is impressive. The progression of reading the floor as a passer, making smarter cuts, and understanding spacing has been substantial.

"Jack has shot the ball well from the perimeter all season, but with his added ability to now to attack with the bounce into pull-ups, Barkley into a turnaround, he’s a dynamic offensive threat; all while making reads."