A week ago, the Texans’ high school girls flag football team won an NFL championship. Competing at the national championship in Canton, Ohio, the Austin-based squad supported by the Texans delivered a 19-0 victory over the Dallas Cowboys. Maxwell Award National Player of the Year Ava Wallace, NFL Flag Player of the year finalist Sonya Chalil and Emory Beckett attended the Texans’ training camp Friday morning along with their teammates and coaches.