Texas Woman Tackles Boundaries on Pro Football Team
Jennifer Welter, a running back for the Texas Revolution football team, runs onto the field before a game at the Allen Event Center in Allen, Texas, on Feb. 21. Welter, who played in a women's football league for 13 years, is the first woman to play a position other than kicker in men's professional football. The Revolution competes in the Indoor Football League.Erin Trieb for NBC News
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