What score makes the Over win?

The Over wins if the Mariners and Nationals score 9 or more combined runs in the game.

What score makes the Under win?

The Under wins if the combined final score is 8 runs or fewer.

When does this Polymarket MLB total resolve?

The market is scheduled around the June 12 game at 6:45 PM ET and resolves after the game is completed, based on the official combined run total.

What happens if Mariners vs Nationals is postponed or canceled?

If the game is postponed, the market stays open until the game is completed. If it is canceled with no make-up game, the market resolves 50-50 according to the listed rules.

Part of: Seattle Mariners vs. Washington Nationals

Seattle Mariners vs. Washington Nationals: O/U 8.5

Q: What is the Mariners vs Nationals O/U 8.5 prediction market?

This market lets traders predict whether the Seattle Mariners and Washington Nationals will combine for more than 8.5 runs in their June 12 MLB game.

This Polymarket MLB totals market covers whether the Seattle Mariners and Washington Nationals will combine for over or under 8.5 runs on June 12 at 6:45 PM ET. It resolves to Over if the teams score 9 or more total runs, and Under if they score 8 or fewer; PolySpotter currently tracks $3,826 in smart money and 2 smart money signals on this market.

In the upcoming MLB game between the Seattle Mariners and Washington Nationals, scheduled for June 12 at 6:45 PM ET: This market will resolve to "Over" if the Seattle Mariners and Washington Nationals combine to score 9 or more runs in this game. If the combined total is less than 9, this market will resolve to "Under". If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.

2 smart money signals detected, totaling $3,826.

Categories: Sports, Games, MLB, baseball

Notable Trades

Elite MLB totals sharp

Elite proven wallet with 1087 wins in 1090 resolved positions and +$135,942 lifetime P&L is buying Over in this MLB total.

This bettor has won 1087 of 1090 resolved positions and is up $135,942 lifetime.
They have a serial cross-market track record across 33 events with consistently profitable results.
Entry at 57¢ implies a straightforward copy with room up to 67¢.

$1,026 on Over | Wallet win rate: 100%

91% winner on MLB total

Sharp bettor with a 91% win rate and $311k lifetime profit is buying Over at 56¢ on an MLB total.

This bettor wins 91% of resolved trades and is up $311,688 lifetime.
They have a long record across 102 events, suggesting repeatable sports-market edge.
Entry at 56¢ implies they see Over as mispriced despite the current market around 57–58¢.

$2,800 on Over | Wallet win rate: 91%