Major League Baseball fans are adopting a "Tarps Off" trend where supporters remove their shirts to cheer for their teams [1].

The movement represents a shift in fan engagement, using collective visual displays and loud noise to influence game atmosphere and team morale. Supporters believe this high-energy enthusiasm can help generate a walk-off win [1, 2].

The trend began May 15, 2026 [1]. At Busch Stadium in St. Louis, fans gathered in a pair of sections in the right-field bleachers to go shirtless [1]. While most reports credit these Cardinals fans with starting the movement, some sources suggest a Stephen F. Austin University club baseball team may have originated the practice [1, 2].

Since its emergence in St. Louis, the practice has spread to other MLB ballparks nationwide [1, 3]. Fans organize in specific sections of the stadium to create a concentrated area of shirtless support, a tactic intended to energize the players on the field [1, 3].

The movement gained significant traction throughout the following week, with celebrations of the trend occurring around May 22, 2026 [1, 3]. The viral nature of the trend has been amplified by social media, turning a localized fan behavior into a broader league-wide phenomenon [1, 3].

Participants said the activity is a fun way to show support while creating a distinct identity for the most passionate sections of the crowd [1, 2]. As the trend continues to migrate across different cities, it has become a recognized sight in the stands of various U.S. stadiums [3].

The "Tarps Off" trend – fans remove their shirts in sections of the ballpark to cheer loudly

The 'Tarps Off' movement reflects a growing desire among sports fans for immersive, participatory experiences that transcend traditional cheering. By coordinating visual cues like mass shirtlessness, fanbases are attempting to create a psychological advantage for their teams, mirroring the 'ultra' culture seen in global soccer where synchronized displays are used to intimidate opponents and motivate home players.