Use the internal polymarket geolocation service.

poly_geo

Improved notification preferences and types.

notifications_v2

funkit_deposit

funkit_withdraw

authenticated_book_ws

Improved in-game view for sports markets.

mobile_sports_overlay_v2

async_order_submission

Enable updates from the sports websocket.

sports_websocket

In the upcoming MLB game, scheduled for September 18 at 2:10PM ET:
If the Seattle Mariners win, the market will resolve to “Mariners”.
If the Kansas City Royals win, the market will resolve to “Royals”.
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.

Mariners vs. Royals

In the upcoming MLB game, scheduled for September 18 at 2:10 PM ET:

This market will resolve to "Yes" if the Seattle Mariners win the game by 2 or more runs.

Otherwise, this market will resolve to "No".

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.

This market will resolve according to the official final score published on MLB.com regardless of the number of innings completed.

Spread -1.5

In the upcoming MLB game, scheduled for September 18 at 2:10 PM ET:

This market will resolve to "Over" if the Seattle Mariners and Kansas City Royals combine to score 10 or more runs in this game.

If the combined total is less than 10, 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.

This market will resolve according to the official final score published on MLB.com regardless of the number of innings completed.

O/U 9.5

In the upcoming MLB game, scheduled for September 18 at 2:10 PM ET:

This market will resolve to "Yes" if no runs are scored in the 1st inning by either Seattle Mariners or Kansas City Royals.

This market will resolve to "No" if at least one run is scored in the 1st inning by either team.

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.

This market will resolve according to the official box score published on MLB.com, specifically the 1st inning run totals.

Moneyline
$197k Vol.

Spreads
$486.9 Vol.

Totals
$956.4 Vol.

No Run First Inning?
$440 Vol.

MLB

Royals vs. Mariners Betting Odds & Predictions (Sep. 18, 2025) | Polymarket

Moneyline$197k Vol.

Spreads$486.9 Vol.

Totals$956.4 Vol.

No Run First Inning?$440 Vol.

MLB

Moneyline
$197k Vol.

Spreads
$486.9 Vol.

Totals
$956.4 Vol.

No Run First Inning?
$440 Vol.