Major League Baseball's players' union sued DraftKings and FanDuel on Monday, accusing the sports betting companies and two others of using the names and likenesses of hundreds of players on their platforms without permission. Players are seeking compensatory and punitive damages from DraftKings and Britain's bet365 Group in Philadelphia federal court, and from FanDuel and Brooklyn-based Underdog Fantasy in a New York state court in Manhattan. Calling online sports betting "big business," MLB players accused the defendants of "flagrant" violations of state laws protecting the right of publicity, saying nearly every active player's image appears on their websites and mobile apps. "For professional athletes, the ability to control the commercial use of their names, images, and likenesses is a crucial return on their substantial career investment," the players said. Keeping such control also helps players avoid being perceived as supportive of companies and products they dislike,...