The Philadelphia Eagles center spoke to Hall of Famer Tony Gonzalez during the broadcast following the Eagles' 34-28 win over Minnesota Vikings in week two of the NFL season.
Kelce was unable to avoid the inevitable questions surrounding his brother's rumoured love interest with the 'Shake It Off' star.
Travis, who plays tight end for the Kansas City Chiefs, has reportedly been cosying up to Swift for a few weeks after initially trying and then failing to give the singer his phone number at one of her recent concerts.
Gonzalez did his best to get a scoop on the rumours but Jason did his best to protect younger brother Travis by keeping schtum.
"So you talk about family, I have a 15-year-old daughter, and she's a big fan of a certain pop star, and you have a family member- a brother- and I've been hearing rumours, maybe some stuff. Can you comment?" Gonzalez asked.
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Jason kept his cards close to his chest, replying: "I've seen these rumours, I cannot comment."
Studio analyst and NFL legend Richard Sherman then weighed in, asking: "What are we going on TMZ? What are we doing?!"
Gonzalez cut back in to further question Jason, putting it down to 'gathering information for his daughter'.
Jason said: "Ever since 'Catching Kelce,' [a reality dating show featuring Travis looking for his next long-term relationship] everybody has been infatuated with Travis' love life. I don't really know what's going on there. I know Trav is having fun."
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"We'll see what happens with whoever he ends up with," he added.