Boston Red Sox vs. Seattle Mariners Betting Splits — June 21, 2026

Notable bet/money split in Boston Red Sox at Seattle Mariners: a 24-point gap on Seattle Mariners -1.5.

Splits at the latest snapshot

Market Side Bet % Money % Odds
Moneyline Boston Red Sox 35% 29% +112
Seattle Mariners 65% 71% -122
Run line Boston Red Sox +1.5 25% 49% -200
Seattle Mariners -1.5 75% 51% +180
Total Over 7 87% 73% -120
Under 7 13% 27% -120

What the data says

Boston Red Sox at Seattle Mariners shows a meaningful bet/money divergence on the spread market — not the biggest split on the slate, but worth a look. 75% of bets are on Seattle Mariners -1.5 while only 51% of dollars are on the same side — a 24-point gap.

A 10 to 20-point gap is the band where the data starts to mean something but doesn't yet scream. It usually means a handful of larger bets landed on Boston Red Sox +1.5 without the public catching on yet, or the public is leaning on a side that the market doesn't fully respect. Either way, the money side here is Boston Red Sox +1.5, and the price reflects what the books think of that lean.

Worth noting, not worth chasing alone. Pair it with the broader slate context if you're going to use it. See how we calculate splits →.

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Where this game ranks today

Slate rank
#3 of tonight's biggest splits — see the full ranking

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Frequently asked questions

What does it mean when Seattle Mariners -1.5 has 75% of bets but 51% of money?

When the bet count and the dollars don't agree, the dollars usually carry the sharper signal. A {gap}pp gap means the average bet on Seattle Mariners -1.5 is smaller than the average bet on the other side.

What is sharp money?

Sharp money is wagering activity from sophisticated, high-volume bettors. It shows up as a money percentage that exceeds the bet percentage on the same side. See our learn page for more.

Should I bet on Seattle Mariners -1.5 tonight?

We don't issue picks. The splits show what the public and the money are doing — use them to inform your own read of the game.

When does the public usually win?

Public favorites still win plenty of games — they are usually the better team. Where the public underperforms is against the spread on big-name teams in nationally televised games.

How does Fade the Public Analytics calculate splits?

We aggregate publicly reported sportsbook handle on a sub-hourly cadence. See our methodology page for the full breakdown.

What is sharp money?

Sharp money is wagering activity from sophisticated, high-volume bettors. It shows up as a money percentage that exceeds the bet percentage on the same side — bigger checks per ticket on the contrarian view. See our methodology →

How we track public bets and money — see our methodology →

Last updated: June 21, 2026 at 9:35 AM UTC

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