With 119 losses, second most in MLB history, they narrowly performed better than the Chicago White Sox of last year who had 121 losses and set the modern MLB record for worst season in MLB history.
However, the Colorado Rockies had a run differential of -424 in the 2025 season, which is the worst since 1900. The team was outscored by a total of 424 runs, an overwhelming margin compared to the previous modern-era record holder, the 1932 Boston Red Sox, who had a -345 run differential. Their starting rotation also had the worst single-season ERA, 6.65, since it became an official stat in both leagues in 1913.
