The 2025 MLB season begins on Tuesday, March 18, with the defending World Series champion Los Angeles Dodgers playing pair of games in Tokyo against the Chicago Cubs. For nearly everybody else, including 15 out of the 16 National League teams, Opening Day arrives on Thursday, March 27. The Colorado Rockies and Tampa Bay Rays will play the first of their 162 games on Friday, March 28.
While each team's season may not start at exactly the same time, every team does start with a clean slate. Nobody is in first place.