Jackson Mahomes was at Arrowhead Stadium on Sunday afternoon to support his older brother, Patrick Mahomes, and the Kansas City Chiefs. Ahead of the Week 12 matchup between the Kansas City Chiefs and the Indianapolis Colts, the social media personality showed off his gameday style.Mahomes wore light washed jeans that he paired with a white shirt and topped off with a light blue zippered, hooded jacket. He showed off two different angles of him standing on the sidelines during pregame warmups in the Instagram post."🥶🦕," Mahomes captioned the Instagram post. View this post on Instagram Instagram PostOf the comments Jackson received on his Instagram post, was from Kansas City Chiefs defensive tackle, Chris Jones' ex-girlfriend, Sheawna, who gave her seal of approval on the outfit."Ok FIT 😍😍," Sheawna commented.Sheawna commented on Jackson's Instagram post. (Credit:@jacksonmahomes)Later in the game, Jackson posted a photo on his Instagram Story of his view of the field from the suite at Arrowhead Stadium. Patrick Mahomes led the Kansas City Chiefs to a comeback win to send the game to overtime and eventually the 23-20 victory.Jackson Mahomes applauded Patrick and Brittany Mahomes' charitable effortsEach year, Patrick Mahomes and his wife, Brittany, host their "15 and the Mahomies Foundation" charity gala. The money raised during the gala through admission, silent auctions and other contests, is then totaled and given directly to local charities all of which better the lives of children.Jackson Mahomes attended the gala along with his mother Randi and younger sister Mia. Afterwards he shared a photo alongside his brother and sister-in-law, congratulating them on the philanthropic work they do."It’s awesome getting to watch you guys give back to so many communities through the @15andmahomies foundation!" Jackson Mahomes wrote. View this post on Instagram Instagram PostThis year, "15 and the Mahomies Foundation" gala raised $1.5 million that was then split amongst 27 Kansas City based charities. The three-time Super Bowl champion created his foundation as a way to not only give back to others but help children thrive in all aspects of life on the field or in the classroom.