It was just another day at the office for the Kelce family.

Donna Kelce said she was “not at all” surprised her eldest son, Jason Kelce, went shirtless during his brother Travis Kelce’s football game Sunday.

The matriarch, 71, told People Thursday that the Philadelphia Eagles center, 36, has opted to go without a shirt “on occasion.”

“He just saves it for special moments,” she said with a laugh.

Donna shared that she sees that type of behavior from Jason all the time, but he typically hides it from the public because he is focused on his football career.

“A lot of people don’t see it because he’s all business nine times out of 10 when he is on the field,” she explained.

“He’s so focused with the game and he’s so into it that people don’t see that side of him.”

Off the field, the mom of two said Jason is “just as lighthearted and as fun and as in the moment” as his younger brother, Travis.

“It’s just, he is more businesslike when it comes to football,” she said.

Since the Eagles lost to the Tampa Bay Buccaneers in the playoffs earlier this month, Donna said Jason has more time to “finally let his hair down.”

“It’s a long season that you have to behave yourself,” she noted.

“Jason’s just being Jason. This is who he is. He is bigger than life, no doubt about it!”

The dad of three went viral after ripping off his “Big Yeti” T-shirt and jumping out of the VIP suite where his wife, Kylie Kelce, and Travis’ girlfriend, Taylor Swift, were watching the Kansas City Chiefs take on the Buffalo Bills at Highmark Stadium in Orchard Park, NY.

While Jason was in the stands with Bills fans, he picked up a young girl who was holding a sign for the “Bad Blood” singer.

The 8-year-old named Ella said Swift, 34, “smiled and waved” at her, which made her cry “happy tears.”

While Kylie, 31, wanted her husband to “get his ass back” into the suite, the Grammy winner seemed was seen encouraging Jason’s shirtless antics.

A shocked Swift — who went public with her romance with Travis, also 34, in September 2023 — gave Jason a high-five as he walked through the box.