2021 MLB World Series Winner Odds

Track the development of winner odds for the 2021 MLB World Series with our historical trend data. Get the latest odds and see who the bookies rank as favourites to lift the The Commissioner's Trophy at the end of the season.

Our 2021 MLB World Series odds page offers the latest odds and a detailed odds history, showing how each participant’s chances have been rated by the bookies in the build-up to the World Series.

We also track the following betting markets – take a look to see current odds and trends over time:

2021 MLB World Series Odds  – Latest Developments on Odds & Favorites:

  • October 15th – The Los Angeles Dodgers won a ferocious five-game series against the San Francisco Giants on Thursday to advance to the National League Championship Series. They are the favorites to win the World Series heading into a matchup with the Atlanta Braves. The Houston Astros have looked dominant in the postseason and are the favorites to advance to the World Series in the American League. They will face the Boston Red Sox in the ALCS.
  • October 13th – The championship odds are moving at a furious pace now. The Houston Astros have looked dominant in the postseason and are the current favorites to claim the World Series title. They will match up with the Boston Red Sox in the American League Championship Series. The Atlanta Braves have advanced to that round in the National League, but will be the underdogs against whichever team wins the San Francisco Giants-Los Angeles Dodgers heavyweight fight.
  • October 11th – The Los Angeles Dodgers won their Wild Card game to advance to the National League Divisional Series. They split the first two games in San Francisco against the Giants to keep them atop the field as the World Series favorites. The Houston Astros are the team to beat in the American League, as they are currently leading their ALDS series against the Chicago White Sox. The Boston Red Sox have seen their odds surge as they are winning their series against the Tampa Bay Rays.
  • October 5th – The Los Angeles Dodgers head into the playoffs as the favorite to win the World Series despite being a wild card entrant. The San Francisco Giants held off the Dodgers by one game for the National League West title, but the teams could be on a collision course in the NLDS, which hurts both of their odds. The Houston Astros have the best odds to win the World Series in the American League, followed by the Tampa Bay Rays.
  • September 29th – The Los Angeles Dodgers remain the favorites to win the World Series, with divisional foe San Francisco sitting with the second-best odds. The Houston Astros and Tampa Bay Rays remain the top two in the American League, with the New York Yankees gaining slightly over the past week.
  • September 22nd – The top two favorites to win the World Series both reside in the National League West. The Dodgers remain the team to beat but still trail the Giants by a game as the regular season draws to a close. The Houston Astros now have the best odds in the American League, followed by the Tampa Bay Rays.
  • September 6th – The Los Angeles Dodgers are one game back of the San Francisco Giants in their own division, but that hasn’t dampened the oddsmakers’ belief in the Dodgers’ World Series hopes. Los Angeles remains the favorite, while the Tampa Bay Rays have surged to the top of pack in the American League. The Dodgers are projected to win the National League West, but if San Francisco continues to defy the odds, these projections could change quickly.

About the data

We monitor trends in odds on key markets of interest by tracking a range of UK and international bookmakers. The update frequency varies, but is clearly shown on all our tables and charts. After fetching odds direct from bookies, we convert them to implied probability to make them easier to manage (read more on implied probability and converting from fractional to % probability). We then take the mean average implied probability to get a consensus view across the betting industry. This average implied probability is what we show on our charts and tables.

MLB World Series Winner Odds

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Previous MLB World Series Winners:

MLB World Series World Series Winner Runners Up
Los Angeles Dodgers Tampa Bay Rays
Washington Nationals Houston Astros
Boston Red Sox Los Angeles Dodgers
Houston Astros Los Angeles Dodgers
Chicago Cubs Cleveland Indians
Kansas City Royals New York Mets
San Francisco Giants Kansas City Royals
Boston Red Sox St Louis Cardinals
San Francisco Giants Detroit Tigers
St Louis Cardinals Texas Rangers

The people behind this page

Compare.bet's online gambling content experts helped write, edit and check this page:

Daniel is the editor-in-chief at Compare.bet. He has half a decade of experience writing on topics including sports betting, online casino and the NBA. Daniel also covers Premier League football for Compare.bet news and has interviewed Louis Saha, Richard Dunne and Gary Pallister. In his spare time, Daniel enjoys film photography and making Spotify playlists.