Part of: Arizona Diamondbacks vs. Seattle Mariners

Arizona Diamondbacks vs. Seattle Mariners: O/U 5.5

In the upcoming MLB game between the Arizona Diamondbacks and Seattle Mariners, scheduled for May 31 at 4:10 PM ET: This market will resolve to "Over" if the Arizona Diamondbacks and Seattle Mariners combine to score 6 or more runs in this game. If the combined total is less than 6, 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.

1 smart money signal detected, totaling $4,650.

Categories: Sports, Games, MLB, baseball

Notable Trades

Profitable serial sports trader

A highly profitable serial cross-market trader with a long track record bought Over while also backing Arizona amid a major pre-game volume spike.

  • This bettor wins 63% of resolved bets and is up about $718k lifetime.
  • They have traded across 258 events, suggesting a repeatable sports-market process rather than a one-off bet.
  • This market saw nearly 70x normal volume before the game, and they bought Over at 32¢.

$4,650 on Over | Wallet win rate: 61%

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Arizona Diamondbacks vs. Seattle Mariners: O/U 5.5

Arizona Diamondbacks vs. Seattle Mariners$4,650 tracked1 signalSportsGamesMLBbaseball
Over
0¢
Under
100¢

In the upcoming MLB game between the Arizona Diamondbacks and Seattle Mariners, scheduled for May 31 at 4:10 PM ET: This market will resolve to "Over" if the Arizona Diamondbacks and Seattle Mariners combine to score 6 or more runs in this game. If the combined total is less than 6, 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.

ARI
2
31-27
Final
SEA
3
31-29
ARI +128SEA -155O/U 7.5Polymarket: 0¢
Venue
T-Mobile Park, Seattle
Attendance
41,897

Notable Trades

Arizona Diamondbacks vs. Seattle Mariners: O/U 5.5

2026-05-31 23:12 UTC

$4,650 on Over at 32¢

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