No Participant can bet on a match or competition in which they are involved that season, or which they can influence, or any other football-related matter concerning the league that they play in. Participants are also prohibited from using or passing inside information for betting.
NFL. Is sports gambling allowed? Players are allowed to bet on non-NFL events with legal sportsbooks, but all other league personnel, including coaches, officials and trainers are prohibited from all sports betting.
The win double needs both horses to win to be successful while the place double needs both horses to place to be successful. As you are placing two bets in one, your stake will be doubled, so a 10 stake would double to 20 to cover both the win double and place double.