Updated MLS predictions reveal best value to win MLS Cup is on Polymarket

With every MLS club now back in action with at least one match in the books following the World Cup break, Dimers' MLS predictions model has crunched the data, and the results point to a clear inefficiency on Polymarket for who will win the MLS Cup.

While recent champions Inter Miami and LAFC, as well as this year's contender on the rise in Vancouver, continue to soak up the betting attention and sit atop the sportsbooks and prediction markets, it's a different club that offers the best value of any realistic MLS Cup contender.

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Nashville SC - The best value to win the MLS Cup

Sitting with the most points in MLS and the best goal differential in the league, Dimers gives Nashville a 13.3% probability of winning the title, good for the third-best mark in the league behind only Inter Miami (24.1%) and just ahead of Vancouver (12.9%). Based on that probability, fair American odds for Nashville would sit around +650.

Despite their dominance over the rest of the league, the actual prices available tell a different story entirely, especially on Polymarket where they have the best price of all.

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On sportsbooks, Nashville is currently priced at +800 for their best odds. On prediction market Kalshi, the the club is trading at 11%. And on Polymarket, where the best number in the market currently sits, Nashville is trading at 9% to win the MLS Cup, equivalent to +1000 American odds. That's a gap of 4.3% (and +350 in American odds) between the model's fair value and the best available price, the largest discrepancy of any team near the top of the board.

Compare that to the three other contenders across sportsbooks and prediction markets:

• Inter Miami- 24.1% on Dimers, but trading above that spot on both Kalshi (26%) and Polymarket (29%), pointing to the public overvaluing Messi after the World Cup
• Vancouver - the consensus second favorite on sportsbooks and prediction markets, trading closer to Dimers' prediction at 12.9%
• LAFC - priced as an equal contender to Nashville across the board, despite Dimers' fourth-place ranking

Nashville enters the stretch run looking like the best team in MLS for most of 2026, dropping a lone match in MLS play all season, a 1-0 road loss to Chicago. The club is unbeaten in ten straight league matches, riding a five-match winning streak, and remains the only team in MLS unbeaten at home this season, outscoring opponents 24-9 at Geodis Park.

Goalkeeper Brian Schwake's 8 clean sheets are good for second in the league, with the club conceding just 11 goals across 16 matches. A healthy Sam Surridge leads the team with 10 goals and Nashville is currently on a points pace that would beat Miami's 2024 single-season record of 74.

Between the league's best form, a top-three model probability, and a market price that lags behind fair value, Nashville SC stands out as the sharpest MLS Cup bet on the board right now, with Polymarket's 9% remains the best entry point to get there.

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