The Seattle Mariners are a professional baseball team competing in Major League Baseball's American League West division. The 2026 World Series represents the championship playoff tournament that concludes the MLB season in October 2026, featuring the winners of the American and National League postseason brackets. Currently trading at 7% implied probability on this prediction market, the Mariners reflect long-shot odds compared to historical championship contenders. The team's path to a World Series title requires winning their divisional playoffs, advancing through the American League Championship Series, and ultimately defeating the National League champion in the best-of-seven World Series finals. The market resolves on October 31, 2026, based on official MLB records and playoff tournament results, with the crown awarded to the first team to win four games in the finals series. At 7%, traders are pricing the Mariners significantly below league average for championship contenders, reflecting the team's historical performance, current roster composition, divisional competition, and overall competitive landscape heading into the 2026 season. The market shows typical volatility expected during the MLB regular season and postseason run, with odds likely shifting meaningfully as roster trades, injuries, trade deadline activity, and playoff momentum develop through 2026.