Odds of +200 mean you can win $200 on a $100 bet, but there's no quick way to determine the implied winning probability. If these odds appeared as fractional odds 2/1 you could quickly solve for the implied winning probability using this formula: Decimal / (Numerator + Denominator) x 100%

Famed sports bettor and furniture salesman Mattress Mack has completed what is believed to be the biggest legal bet in sports betting history. With the Astros' World Series win on Saturday, Jim Mattress Mack  McIngvale cashed in on a payout of $75 million from various sportsbooks.