Bobby Valentine remembers the days when he would ride around his neighborhood on his bike and round up the guys for a sandlot baseball game. Or two games. Or three. "I was the ringmaster," said Valentine, an ESPN analyst and former major league manager who grew up in Stamford, Conn. "All the kids in the neighborhood kept their gloves on my handlebars, so I'd just ride down by their houses hollering that it was time to play. Usually, I didn't even knock on doors. I just hollered. We'd play until dinner was on the table." No coaches. No uniforms. And...