Travis Kelce mocked his brother Jason for being too fat for wearing the shirt in his Monday Night Football debut

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Travis Kelce poked fun at his brother, Jason Kelce, for sporting a too-small shirt on his “Monday Night Countdown” debut.

The former Philadelphia Eagles player, 36, was introduced by ESPN host Scott Van Pelt, who explained the retired athlete was wearing a white button-up he purchased “at the mall today” because he forgot his travel bag.

“It fits my belly now; I’ve lost a little bit of weight, but my tits are still struggling,” Jason responded while attempting to cover up his chest, which peeked through the gaping buttons of the lululemon garment.

Jason Kelce's debut on "Monday Night Countdown."
Travis Kelce made fun of his brother, Jason Kelce, for wearing a small shirt on his first “Monday Night Countdown” appearance.ESPN/Instagram

Jason Kelce's debut on "Monday Night Countdown."
The retired athlete was forced to purchase the shirt at the last minute after forgetting his luggage.ESPN/Instagram

Travis, 34, got a kick out of his brother’s mishap, as he took to the Instagram comments of the ESPN video to write, “Surprised he even bought a new one, and didn’t just go shirtless.”

The tight end seemingly alluded to when Jason ripped off his T-shirt to celebrate Travis’ touchdown during the Kansas City Chiefs game against the Buffalo Bills in January.

The iconic moment left Travis’ girlfriend, Taylor Swift, stunned as Jason then jumped from their VIP suite to the stands at Highmark Stadium.

Jason Kelce's debut on "Monday Night Countdown."
“It fits my belly now; I’ve lost a little bit of weight, but my tits are still struggling,” he said.ESPN/Instagram

Travis Kelce and Jason Kelce attend the game against the Boston Celtics and Philadelphia 76ers during Game 6 of the 2023 NBA Playoffs Eastern Conference semi-finals on May 11, 2023.
Travis poked fun at his brother in the comments of ESPN’s video posted to Instagram.NBAE via Getty Images

Travis Kelce with Jason Kelce after a 17-10 victory against the Baltimore Ravens in the AFC Championship Game in Jan. 28, 2024.
“Surprised he even bought a new one, and didn’t just go shirtless,” the tight end quipped.Getty Images

Jason Kelce #62 of the Philadelphia Eagles celebrates after the Kansas City Chiefs score a touchdown during the first half of the AFC Divisional Playoff game against the Buffalo Bills at Highmark Stadium on Jan. 21, 2024
Travis was seemingly referring to when Jason ripped off his T-shirt during the Kansas City Chiefs game against the Buffalo Bills in January.Getty Images

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While the “Lover” songstress cheered for Jason, his wife, Kylie Kelce, attempted to take control of the situation as she shouted at the former professional footballer to “get [his] ass back in here.”

Travis learned about his brother’s antics immediately after the game, telling Westwood One Sports that it didn’t “surprise [him] one bit.”

“I love that guy. And every time we’re not on the field together, we’re always rooting for each other,” he said with a smile.