Jason Kelce takes swig from bowling ball dressed as Fred Flintstone during wild Bills MNF tailgate

It was a chaotic reunion months in the making.Jason Kelce reveled with Bills Mafia on Monday before Buffalo’s prime-time clash against the Jets at MetLife Stadium, 10 months after the retired Eagles center partied with those same fans before a playoff matchup between the Bills and younger brother Travis Kelce’s Chiefs.Dressed like Fred Flintstone and wearing a furry Bills hat, Jason — now serving as an analyst on ESPN’s “Monday Night Countdown” — could be seen downing a Gatorade shot from a bowling ball, just like he did in Western New York this past January.“Hope you guys snuck something in there,” he quipped in a video posted on X by former Bills center Eric Wood.Jason, 36, became one with Bills Mafia during the Chiefs’ Super Bowl run last season.During Kansas City’s Divisional Round matchup at Buffalo, the 13-year NFL veteran lost his shirt while celebrating the Chiefs’ 27-24 victory at Highmark Stadium, where the Kelce family was joined by Travis’ girlfriend, pop superstar Taylor Swift.“Tay said she absolutely loved you,” Travis, 35, said on an episode of the brothers’ “New Heights” podcast at the time.Jason was told by wife Kylie he had to be on his “best behavior” when meeting Swift, 34.“She’s like, be on your best behavior, and I was like, Kylie, the first day I met you I was blacked out drunk and fell asleep at the bar.This is part of the Jason Kelce charm.

I want to make my best first impression, this is my best chance,” he said.Although Travis and Swift were in the New York area Monday, with the couple checking out the Yankees’ 5-2 win over the Guardians in Game 1 of the ALCS at Yankee Stadium, it was Jason who held down the fort at MetLife while covering the Bills’ 23-20 win over the Jets on “Monday Night Football.”Jason has been living his best life at tailgates this season, mingling with Chiefs fans just last week before Kansas City’s prime-time home win against the Saints.He also had quite the h...