The sports star is heading to another Super Bowl with the Kansas City Chiefs this weekend but is disappointed that his brother won't be lining up for their Philadelphia Eagles opposition after bringing his career in the sport to a close last year.
Travis told PEOPLE: "I'll never forget, obviously it's being so close to him retiring.
"I wish he would have played another year, but you know, he's very content where he is in life right now and I'm happy to help."
Travis - who is in a relationship with pop star Taylor Swift - acknowledged that his brother's retirement has allowed him to focus on other important matters.
The tight end said: "He gets to be around his family girls a little bit more, you know?"
Travis has vowed to make his family proud in his brother's absence from the Super Bowl.
He said: "I'll go out there and try to represent the family as best I can."
During a recent edition of their 'New Heights with Jason and Travis Kelce' podcast, Jason confirmed that he would be supporting both his former team-mates and younger brother during Sunday's (09.02.25) game.
He said: "That's the reality of it. No matter what on game day, I'm gonna be happy for one of those sides, and I'm gonna be sad for the other side.
"And it’s similar to the last time we played. I mean, maybe a little bit less intense because I'm not playing now, but I think it's gonna be very, very similar. I really do."