World Series Winner Betting Odds. Get the best available MLB odds from all online bookmakers with Oddschecker, the home of betting value. 5. Nov. Ex. New York Yankees (20/1) to win the World Series. The Yankees are listed as a 20/1 betting choice to win the World Series. If you wager $ on New York to. The Cubs opened as the betting favorite to win the World Series, but after going in May, it's clear they're not the same force they.