2025 Colorado Rockies season

The 2025 Colorado Rockies season was their 33rd in Major League Baseball (MLB), their 31st season at Coors Field, and their ninth and final under manager Bud Black, who was fired on May 11, after a 7–33 (.175) start to the season. In their worst season in team history, one of the worst MLB seasons in the modern era since the previous year's Chicago White Sox, and one of the worst seasons in the National League since the 1962 New York Mets, the Rockies opened to an 8–42 (.160) record through their first 50 games, marking the worst 50-game start in the era. On May 31, following a defeat to the New York Mets, the Rockies established a new MLB record for the fewest number of wins at the end of May, 9, and are the first team in history to open a season with 19 straight series losses. The Rockies lost a major league-record 22 straight series dating back to the previous September. They won their first series on June 3, sweeping the Miami Marlins.

On July 8, following a defeat to the Boston Red Sox, the Rockies set a record for the most losses before the All-Star Break in modern history, with 74 losses, surpassing the 2024 White Sox, who had 71 losses. The Rockies clinched their seventh consecutive losing season after a 15–1 loss at home on August 4 to the Toronto Blue Jays. After a 5–1 loss to the Pittsburgh Pirates on August 23, the Rockies became the first team to be eliminated from postseason contention. After a 7–4 loss to the San Francisco Giants on September 2, the Rockies clinched their third consecutive 100-loss season. The team failed to improve on their 61-101 record from 2024 after a 10–8 home loss on September 6 to the San Diego Padres and set a franchise record for their worst season ever two days later upon losing their 104th game to the Los Angeles Dodgers. The Rockies, however, avoided tying the previous year's White Sox’s 41–121 record, securing their 42nd win on September 19 with a win against the Los Angeles Angels. On September 24, in a loss to the Mariners in which they allowed nine runs, the Rockies became the first team since their 1999 team to give up at least 1,000 runs to their opponents in a season. Four days later, after a 4–0 loss to San Francisco, the Rockies finished the season with 43 wins and 119 losses, tying for the third-most losses in the modern era with the 2003 Detroit Tigers, who had the same record. The Rockies' −424 run differential is the worst by any MLB team in the modern era and the worst since the 1899 Cleveland Spiders.

This was their first season without outfielder Charlie Blackmon since 2010, as he retired at the end of the 2024 season.