The next big thing in women’s boxing? Turns out Claressa Shields is the big thing now. The 16-year-old middleweight from Flint, Mich., turned the first U.S. Olympic Team Trials for Women’s Boxing on end Monday night with a dominant performance in upsetting top-seeded Franchon Crews in a crackling highlight to the opening round. And on a night when nerves seemed to earn a draw in more than a handful of bouts, the youngest competitor among the 24 trying to take the next step to the London Olympics betrayed none. “I wanted it – I wanted to fight her as soon as I qualified,” said Shields. “She was saying she’s the best, so if she’s the best, I wanted her. Piece of work”/John Blanchette, SR. More here. (AP file photo: Tyrieshia Douglas, red, fighting Marlen Esparza plans to box in a skirt if she makes the U.S. Olympic team)

Question: Can someone explain how women's boxing can be an Olympic sport but men's baseball and women's softball aren't?