Travis Kelce stepped out to support his brother, Jason Kelce, after his PDA-packed night with Taylor Swift.The Kansas City Chiefs tight end was photographed leaving the “Cruel Summer” singer’s NYC apartment solo on Sunday en route to MetLife Stadium to watch the Philadelphia Eagles take on the New York Jets.Travis was decked out in a green tracksuit with white Nike sneakers, black shades and backward baseball cap as he hopped into a black SUV outside the songstress’ luxe pad.Not long after his departure, the NFL star was seen in the crowd cheering on his older brother, who’s the Eagles’ center.Despite being from Pennsylvania and a massive Eagles fan, Swift did not attend the game with her new beau.The hunky athlete’s solo outing comes after a source exclusively told Page Six that he and the “Shake It Off” hitmaker were seen kissing at the “Saturday Night Live” afterparty hours before.