Prensa Internacional/Zuma Press/Icon Sportswire
Author: Anthony Vlahovic
Last Updated: 15 October, 2025
2025 MLB League Winner Odds
Becoming a World Series champion is the goal for all MLB teams, but winning a pennant is nothing to brush off. Before teams can fight for a World Series ring, they must first win their league's pennant, a feat that adds to the bragging rights for fans debating which franchise is historically superior. In 2024, two powerhouse franchises returned to the top as the Yankees and Dodgers broke through to the World Series.
Both teams opened as the favorites to win their respective leagues in 2025. However, as the season progresses into the end of the Championship Series, only the Dodgers remain, taking on the Brewers. Meanwhile, in the AL, it's down to the Mariners and Blue Jays. Here, we’ll look at the updated odds for each team to win the AL or NL across all the top sportsbooks in Arizona.
2025 AL Winner - Best Odds
Team | Opening Odds | Current Best Odds |
|---|---|---|
Seattle Mariners | +1200 | -650 (BetMGM*) |
Toronto Blue Jays | +3000 | +500 (DraftKings) |
Odds as of October 15, 2025
* = the same odds are offered by multiple sportsbooks.
2025 AL Winner Remaining Contenders
Team | DraftKings | BetMGM | Caesars |
|---|---|---|---|
Seattle Mariners | -650 | -650 | -650 |
Toronto Blue Jays | +500 | +475 | +475 |
*Odds as of October 15, 2025
Current American League Favorites
Seattle Mariners: For the first time since 2001, the Seattle Mariners are AL West champions. Behind current MVP favorite Cal Raleigh, the Mariners' offense ranked 2nd in the league in SLG and 1st in OPS over the final month of the regular season, while their pitching staff was 9th in FIP and 3rd in xFIP during the regular season. While the Mariners would drop the opening game of the ALDS to the Tigers, they would eventually win the series in extra innings in Game Five. To start the ALCS, the Mariners' offense has continued to come up with timely hits, so with the series shifting back to Seattle, they hold a commanding 2-0 lead.
Toronto Blue Jays: After the Blue Jays swept the Yankees before the All-Star break and took over first place, Toronto looked as if they would put the division away. However, after stumbling down the stretch, the Blue Jays only won the division due to a tiebreaker over the Yankees, as both teams finished with the same record. With the #1 seed, the Blue Jays were able to host the Yankees in the ALDS, and in the first two games of their series, they scored 23 runs on the way to a commanding 2-0 series lead. While Toronto could not complete the sweep, they still got the job done in Game Four to advance to the ALCS. Toronto's offensive explosion in the ALDS did not carry over into Game One of the ALCS, as they finished with two hits and could not keep pace with Seattle in Game Two.
2025 NL Winner - Best Odds
Team | Opening Odds | Current Best Odds |
|---|---|---|
Los Angeles Dodgers | +215 | -1000 (DraftKings) |
Milwaukee Brewers | +2200 | +800 (Caesars) |
Odds as of October 15, 2025
* = the same odds are offered by multiple sportsbooks.
2025 NL Winner Remaining Contenders
Team | DraftKings | BetMGM | Caesars |
|---|---|---|---|
Los Angeles Dodgers | -1000 | -1200 | -1300 |
Milwaukee Brewers | +700 | +750 | +800 |
*Odds as of October 15, 2025
Current National League Favorites
Los Angeles Dodgers: The reigning World Series champions returned a ton of crucial pieces for the 2025 season, and to make things even better, Shohei Ohtani returned to the mound after he put up an MVP season at DH. With a good mix of returning players and new acquisitions, LA finished the regular season 3rd in xSLG and in xwOBA, while their pitching staff was 3rd in strikeouts. While those numbers weren't good enough to earn them a top two seed in the NL, the Dodgers made light work of the Reds in the Wild Card series. Los Angeles would then go on to win the first two games of the NLDS on the road in Philadelphia. After losing Game Three, though, a costly error by the Phillies in Game Four has sent the Dodgers back to the NLCS, where they have quickly taken a 2-0 series lead on the arms of Blake Snell and Yoshinobu Yamamoto.
Milwaukee Brewers: There aren't many teams that have played better baseball than the Brewers since the All-Star break. By boasting the best record in baseball, the Brewers secured the NL Central over the Cubs and the #1 seed in the NL. Milwaukee climbed its way to the top of the league by dominating both sides of the ball, as its pitching staff finished 2nd in SLG, 3rd in wOBA, and 2nd in hard hit percentage, per BaseballSavant. Meanwhile, on offense, they had the 11th-highest wOBA and the 2nd-highest OBP this season. Milwaukee's relentless offense wasted no time in its postseason debut, either, jumping all over the Cubs in games one and two of the NLDS. However, after failing to close out the series on the road, Milwaukee needed a Game Five to send them to the Championship Series. The Brewers now have their work cut out for them, as the NLCS heads back to LA with them down 2-0.
Past American League Pennant Winners & Odds
Season | Winner | Opening odds | Mid-season odds |
|---|---|---|---|
2024 | New York Yankees | +750 | +275 |
2023 | Texas Rangers | +2500 | +475 |
2022 | Houston Astros | +375 | +200 |
2021 | Houston Astros | +1100 | +225 |
2020 | Tampa Bay Rays | +1200 | +557 |
2019 | Houston Astros | +295 | +215 |
Previous National League Pennant Winners & Odds
Season | Winner | Opening odds | Mid-season odds |
|---|---|---|---|
2024 | Los Angeles Dodgers | +380 | +175 |
2023 | Arizona Diamondbacks | +3500 | +1200 |
2022 | Philadelphia Phillies | +1400 | +2000 |
2021 | Atlanta Braves | +450 | +175 |
2020 | Los Angeles Dodgers | +285 | +152 |
2019 | Washington Nationals | +800 | +1250 |
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