There are lots of reasons to be happy in San Diego. The city has tropical weather, a beautiful coastline and a state-of-the-art zoo. And the city’s football team, the Chargers, have only had one sub-.500 season in the last 11 years. Despite all of this, it has the least optimistic football fans in the country.

During NFL training camps and preseason (July 22 to Sept. 7), Facebook aggregated the posts and comments of its 49 million users who like an official team page. For the first time, they measured those fans’ sentiments and classified them based on how positive or negative they were for their given team. The result: Chargers’ fans are the least optimistic in the NFL.

“Facebook is the largest community of sports fans in the world,” said Dan Reed, Facebook’s head of global sports partnerships. “You can measure sentiment with a large degree of accuracy.”

While the Chargers seem relatively innocuous in the NFL news cycle, there have been plenty of reasons for San Diego fans to be pessimistic: Rumors have been swirling about the team moving to Los Angeles, while quarterback Philip Rivers’s future with the franchise was in doubt until a recent contract extension.

New England Patriots’ fans rated as the second-least optimistic after San Diego’s, but the study included a large period when it looked like quarterback Tom Brady would be suspended for his alleged role in the Deflategate scandal. Some of the other least optimistic teams are more obvious—such as the Jets and Redskins. Even Bills fans are relatively pessimistic, despite the hiring of the perennially optimistic and Super Bowl-promising Rex Ryan as coach.