Eva McCloskey often tells people she has two careers. During the week, the 35-year-old is the director of talent strategy at the New York City consulting firm DDG. On weekends, she trades her high heels for roller skates. She is the captain of the Brooklyn Bombshells. Her team remains undefeated this season in the all-women Gotham Girls Roller Derby league.

Ms. McCloskey recalls watching roller derby on TV as a child. “I thought the girls looked so tough and cool,” she recalls.

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