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 28th – The Houston Astros won Game 2 of the World Series on Wednesday and have reclaimed their stake as the championship favorites. The Astros and Atlanta Braves are now tied at one game apiece in the best-of-seven series as it shifts to Atlanta on Friday.
  • October 27th – The Atlanta Braves captured Game 1 of the World Series and are now the favorites to claim the title. Atlanta was given only a 2.44% implied probability to win the championship in August but have gone on an impressive run. The Astros are not big underdogs by any means and would likely become the favorite again with a Game 2 victory.
  • October 26th – It is the Houston Astros against the Atlanta Braves in the World Series. Atlanta was a major underdog to make it this far, and while Houston is favored in the series, it could certainly go either way. The Astros knocked off the Red Sox to make it here while the Braves defeated the favored Los Angeles Dodgers.
  • October 21st – The Houston Astros have rallied to take a 3-2 lead over the Boston Red Sox in the American League Championship Series and have correspondingly become the favorites to win the World Series. The Atlanta Braves have a 3-1 series lead on the Los Angeles Dodgers in the National League Championship Series and have the second-best odds. The Dodgers were the favorites to win the title throughout the regular season but will need a serious comeback to overtake Atlanta in the NLCS.
  • October 15th – The Atlanta Braves were longshots to win the World Series just a week ago but have zoomed to the top of the list after winning the first two games of the National League Championship Series over the Dodgers. The Boston Red Sox’ odds have also surged as they have a 2-1 lead over the Houston Astros in the ALCS. The Dodgers and Astros were the favorites going into their respective series and the oddsmakers believe they both have a chance to rally and make the World Series.
  • 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

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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.