- The 2025 Colorado Rockies have the worst record through 50 games in MLB history.
- Colorado broke a record set by the 2023 Athletics.
- Detroit and Kansas City appear twice on the list below.
The 2024 Chicago White Sox, owners of the worst regular season record in MLB history, aren’t among the 11 teams with the worst 50-game starts.
Eleven teams have won 14 or fewer of their first 50 games, with the Detroit Tigers and Kansas City Royals featuring on the list twice. Most of these teams were outsiders to make the playoffs in preseason baseball betting markets, and the 2003 San Diego Padres were the only team to lose fewer than 100 games.
Worst Records To Start an MLB Season After 50 Games
| Team | Record | Year |
| Colorado Rockies | 8-42 | 2025 |
| Oakland Athletics | 10-40 | 2023 |
| Detroit Tigers | 12-38 | 1996 |
| Miami Marlins | 13-37 | 2013 |
| Kansas City Royals | 13-37 | 2006 |
| Kansas City Royals | 13-37 | 2005 |
| Detroit Tigers | 13-37 | 2003 |
| Houston Astros | 14-36 | 2013 |
| Washington Nationals | 14-36 | 2009 |
| San Diego Padres | 14-36 | 2003 |
| Tampa Bay Devil Rays | 14-36 | 2001 |
Which MLB Team Has the Worst Record to Start a Season?
Winning only eight of their first 50 games, the 2025 Colorado Rockies have the worst record to start a season in MLB history.
Preseason MLB betting markets had the Rockies as a long shot to make the playoffs, along with a win total of 59.5. Even with low expectations, Colorado’s historically bad start led to changes, with manager Bud Black fired on May 11. Top prospects Chase Dollander and Zac Veen were called up a few weeks into the season.
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