Jajaira Gonzalez was scrolling through social media at her job in a Virginia kickboxing gym about three years ago when she spotted some of her former USA Boxing teammates traveling the world, competing for medals and generally living their best lives. The Instagram post hit Gonzalez like a stiff jab, snapping her out of a quarter-life slumber. Gonzalez was once the most promising amateur female boxer in the U.S. — a teenage prodigy with power, endless stamina and ample skill from years of sparring with her older brothers while training under their demanding father, Jose.