Worst record in MLB history
The 1899 Cleveland Spiders, 20-134 (.130).
Since 1901 the worst is the 1916 Philadelphia Athletics' 36-117 (.235). The 2024 Chicago White Sox lost 121, the most in a season, one more than the 1962 New York Mets' 120. In 2026, the Colorado Rockies were worst at 58-104.
Worst winning percentage since 1901
Seasons of 100 or more decisions.
Regular season, the American and National Leagues since 1901. Ties are not counted. The schedule was 154 games until it went to 162 (1961 in the AL, 1962 in the NL).
Before 1901, in the National League: the 1899 Cleveland Spiders, 20-134, the 1876 Cincinnati Reds, 9-56 and the 1890 Pittsburgh Pirates, 23-113.
Every 110-loss season
Each franchise's worst record
Counted by franchise today, including its years under another name or in another city.
Questions
What is the worst record in MLB history?
The 1899 Cleveland Spiders' 20-134, a .130 winning percentage. Since 1901, the worst is the 1916 Philadelphia Athletics' 36-117 (.235).
What is the most losses in an MLB season?
121, by the 2024 Chicago White Sox (41-121). The 1962 New York Mets had held the modern record with 120.
What is the worst record in a 162-game season?
The 1962 New York Mets' 40-120 (.250). The 2024 Chicago White Sox lost more games (121) but won 41, so their percentage was .253.
How many teams have lost 110 games?
23 since 1901. The most recent: the 2025 Colorado Rockies.
Which team had the worst record in 2026?
The Colorado Rockies, 58-104.
Which franchise has the most 100-loss seasons?
The Oakland Athletics, 18 since 1901.