When analyzing head-to-head regular-season series, roster depth, and power rankings across Major League Baseball, the Los Angeles Dodgers are consistently favored by oddsmakers over the Seattle Mariners. The Dodgers' status as heavy favorites stems from their massive financial flexibility, star-studded lineup, and sustained multi-year championship pedigree. However, the Mariners feature elite pitching depth capable of shutting down any opponent, making any individual matchup highly competitive.