The New York Yankees hold the highest implied probability at 28.5% for the 2026 American League pennant, driven by their potent offense and early-season consistency that has kept them near the top of the AL East standings. The Seattle Mariners sit second at 16.5% thanks to a deep rotation featuring established aces and emerging depth that positions them well in the competitive AL West. Tampa Bay leads the division with the best record but trails at 8.1%, reflecting market caution around sustained pitching health and roster durability over a full campaign. The broad field, including Texas, Toronto, and Detroit in the 6-8% range, underscores a season where recent form, injury resilience, and head-to-head matchups will shape playoff positioning more than preseason expectations.