Colin Kaepernick's protest against the American flag and social injustice have inspired a wide variety of pro, college and amateur athletes to kneel or raise a fist during the playing of the U.S. national anthem.
But there's one group of pro athletes who are vowing to stand at attention during the playing of the "Star-Spangled Banner." They're the cowboys of Professional Bull Riders (PBR).
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Sean Gleason, chief executive of PBR, wrote on the league's Facebook page Wednesday that all 35 of the top bull riders in PBR's Built Ford Tough series have pledged to respectfully stand in unity during the presentation of the American flag and singing of the national anthem.