Travis Kelce was able to have a little fun Monday night despite a crushing loss to the Eagles ... telling his big brother, Jason Kelce, the defeat was "a late birthday present" for the Philly star.
Travis shared the lighthearted moment with Jason just seconds after Philadelphia pulled off the 21-17 upset at Arrowhead Stadium ... roughly two weeks after Jason turned 36 years old.
"Love you, big guy," Travis said after throwing out the quip to the offensive lineman. "Get home safe."
Of course, Travis was anything but smiles just minutes earlier .