An NFL fan was captured on video yelling an anti-gay slur at Patrick Mahomes' brother before the Chiefs took on the Broncos on Sunday.
The incident went down at Empower Field at Mile High in Denver ... when Jackson Mahomes and Patrick's fiancee, Brittany Matthews, were down on the field taking pregame pictures and videos.
You can hear in footage from the scene, a fan in the stands clearly yelled for Jackson with a homophobic slur repeatedly.
"Hey, Ma-H**o!