It's the affectionate family nickname that tells the world he's one of his brother's biggest fans.

Seen in these exclusive pictures obtained by DailyMail.com , 36, stepped off a private jet in Buffalo early Sunday afternoon wearing a bright yellow T-shirt with a cartoon figure of his little brother and the words, ' Big Yeti,' ahead of the . 

Hard to imagine a more significant day for City or the Kelce family, aside from  LVII, which Jason's Eagles lost to Travis' Chiefs. 

The will decide whether the Chiefs advance to the AFC Championship in Baltimore next weekend or if their season will come to an end on Sunday.

Meanwhile, up in the VIP boxes , 34, is expected take another step closer to the Kelce clan as she meets her NFL stud's big brother and his wife Kylie Kelce for the first time today.

Jason Kelce (pictured) arrived in Buffalo on a private plane on Sunday to cheer on Travis 

Ed Kelce is pictured wearing his son Travis' No. 87 underneath a Kansas City Chiefs jacket 

Jason, Kylie and family patriarch Ed - wearing bright red Chief's starter jacket and a jersey bearing his younger son's No. 87 - all trudged across the snowy airfield

It's not clear if the blonde woman in the long brown coat is Donna, the Kelce's mother 

Jason, Kylie and family patriarch Ed - wearing bright red Chief's starter jacket and a jersey bearing his younger son's No. 87 - all trudged across the snowy airfield to a waiting sprinter van as the countdown to the AFC Divisional game began in earnest.

Travis, 34, and the rest of his team touched down in New York state 3:30pm on Saturday. The tight end cut a striking figure in mustard yellow suit, striped shirt, beanie hat and shades.

The bold look drew some good-natured ribbing from Jason who joked, 'Looks like he's auditioning for a new Wes Anderson film.'

If Travis looked particularly stone-faced yesterday it was perhaps little wonder.

Shortly before taking off from Kansas City he learned the NYPD arrested a suspected stalker allegedly trying to get into Swift's Tribeca apartment earlier in the day.

At least one member of the Kelce family, mother Donna, has met Taylor Swift several times

Jason Kelce chats with several workers at the private airfield in western New York State 

Jason Kelce, wife Kaylie (far left in black) and Ed Kelce are seen making their way to the van 

Jason Kelce joked that Travis looked like he was auditioning for a Wes Anderson film

Jason, of course, has a free weekend after the Eagles were eliminated from the postseason by the Tampa Bay Buccaneers on Monday. It has plunged Jason's long-term football future into doubt, with reports on Tuesday morning emerging that he told the Eagles locker room that he is retiring.

But since then, Jason has stayed coy over what the future holds and Travis even suggested on Friday that his big brother could play on.

No timeline has been given as to when Jason expects to announce his football future.

The Kelce brothers have an extremely close relationship and Travis suggested Jason might keep playing when he spoke at a Chiefs press conference ahead of the Bills game.

'It came out that he retired and he didn't really say any of that,' Travis Kelce said Friday. 'The end of that game, I think everyone kind of felt for him knowing that he has been thinking about it a lot over the past couple years.'

'The [Amazon] documentary shows that. You don't need to go around and ask anybody,' Travis continued. 'It's been cool to see everybody appreciate who he's been over the years this past week.'

'I think the big guys still got some football left if he wants it,' Kelce concluded.