If an MLB moneyline is a positive number (+200), then that number is the amount of money you would win if you were to wager $100 on a bet, and be correct. So a moneyline of +200 means that you would win $200 on a successfully predicted wager of $100. In other words, you win $200 if you bet $100 and are right. This is an essential concept to familiarize yourself with when learning how to bet on MLB.