MLB Trade Deadline Transforms World Series Contenders

At the 2025 MLB trade deadline, the Seattle Mariners and San Diego Padres made major moves to strengthen their rosters and improve World Series hopes. The Mariners acquired power hitters Josh Naylor and Eugenio Suarez, turning their offense into one of the most formidable in the league. The Padres added ace reliever Mason Miller and bolstered both their lineup and bullpen, highlighting a league-wide trend toward building 'super bullpens.' The New York Mets and Yankees also enhanced their bullpens with high-leverage arms, while the Astros reacquired Carlos Correa and the Phillies traded for closer Jhoan Duran. These aggressive strategies led to improved championship odds for several teams, including the Padres, Mariners, and Astros. In contrast, teams like the Braves and Cubs had less active deadlines, which could impact their postseason chances.