Kansas City Chiefs quarterback Patrick Mahomes isn’t that surprised by Jason Kelce’s enthusiastic support for his younger brother.

The Philadelphia Eagles center, 36, made waves while showing his support for his brother, Kansas City Chiefs tight end Travis Kelce, during the Chiefs’ playoff win over the Buffalo Bills Sunday. Jason pulled off his shirt and let out a scream when Travis, 34, scored his first touchdown.

Mahomes, 28, chalked it up to “Jason being Jason,” in an interview on The Drive radio show.

The quarterback told host Carrington Harrison that Jason’s reaction aligns with the Kelce family’s support for one another.

“That Kelce family, man, they live on high energy,” said Mahomes. “They’re a family, and they love each other, and they’re going to support each other.” 

“So it’s cool to see and I mean, that was an all-time moment,” confessed the two-time Super Bowl MVP. 

Mahomes alluded to Jason having some wilder moments. “At the same time, he’s had a lot better,” he said.

Fans may have to tune into the Chiefs’ game against the Baltimore Ravens Sunday to see if Jason tops his recent appearance, Mahomes teased. “Who knows what he’ll do this week,” he said.

Jason’s middle daughter, 2½-year-old Elliotte, also had some things to say about her father’s antics.

Shortly after the game, his wife Kylie shared a text from “Ma” — presumably Kylie’s mom — to X. The message read, “Ellie said ‘Dads boobs are showing!'”

Jason and Kylie, 31, are also parents to Wyatt Elizabeth, 4, and Bennett Llewellyn, 11 months.

Jason sat alongside his wife, his mom Donna Kelce, his father Ed Kelce, Taylor Swift and Patrick’s wife, Brittany Mahomes Sunday.

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The Chiefs will next play the Ravens on Jan. 28 at M&T Bank Stadium in Baltimore for the AFC Championship. If they win, the Chiefs will play in Super Bowl LVIII on Feb. 11 and have the opportunity to win back-to-back Lombardi Trophies.