A behavioral trend characterized by the collective removal and waving of shirts by spectators, termed 'Tarps Off,' has transitioned from collegiate athletics into Major League Baseball (MLB) stadiums.

一種被稱為「脫衣」(Tarps Off) 的行為趨勢，其特點是觀眾集體脫下並揮舞上衣，現已從大學體育賽事轉移至大聯盟 (MLB) 球場。

The genesis of the 'Tarps Off' practice is attributed to a 2025 collegiate football event at Oklahoma State University, where a single spectator's action—motivated by a monetary wager—precipitated a wider adoption among students. This behavioral pattern subsequently disseminated across various collegiate institutions, including the University of Wisconsin, UCLA, and Virginia Tech. The transition to professional baseball commenced on May 15, 2026, at Busch Stadium in St. Louis. The catalyst for this shift was the attendance of seventeen members of the Stephen F. Austin State University club baseball team, whose coordinated shirtless displays were subsequently emulated by hundreds of other patrons. This activity coincided with a St. Louis Cardinals victory via a walk-off single in the eleventh inning.

「脫衣」這一做法源於 2025 年奧克拉荷馬州立大學的一場大學美式足球賽，當時一名觀眾因金錢打賭而脫衣，促使更多學生效仿。隨後，這種行為模式傳播至各個大學機構，包括威斯康辛大學、UCLA 和維吉尼亞理工大學。2026 年 5 月 15 日，這一趨勢開始進入職業棒球，地點位於聖路易斯的布什體育場。促成此轉變的催化劑是史蒂芬 F. 奧斯汀州立大學棒球隊 17 名成員的出席，他們協調一致的脫衣展示隨後被數百名其他觀眾效仿。此次活動恰逢聖路易紅雀隊在第 11 局以一支再見安打獲勝。

Institutional responses to this phenomenon have varied. The St. Louis Cardinals organization demonstrated a formal rapprochement with the movement; Manager Oliver Marmol provided financial sponsorship for tickets to ensure the continued presence of these spectators. Furthermore, the organization officially designated the upper right-field bleachers as a 'high-energy fan section,' permitting access to any patron regardless of their original ticket location. Similar behavioral clusters have been documented in other jurisdictions, including Detroit, Tampa Bay, Philadelphia, Seattle, and Anaheim. In Anaheim, the practice was utilized as a vehicle for political expression, with fans chanting for the divestment of team ownership by Arte Moreno.

機構對此現象的反應各異。聖路易紅雀隊組織對該運動表現出正式的接納；總教練 Oliver Marmol 提供票券資金贊助，以確保這些觀眾能持續出席。此外，組織正式將右外野上方的看台指定為「高能量球迷區」，允許任何觀眾進入，無論其原票位置為何。在底特律、坦帕灣、費城、西雅圖和安那海姆等其他地區也記錄到了類似的行為集群。在安那海姆，這一做法被用作政治表達的手段，球迷們高喊要求 Arte Moreno 剝離球隊所有權。

From an operational perspective, the trend is viewed as a potential catalyst for increased stadium vitality and attendance. Data indicates that MLB attendance has increased by approximately 1,000 spectators per game compared to the previous year. Should this trajectory persist, the league may achieve an average attendance of 30,000 per game, a metric not observed since 2016. The adoption of this practice is further facilitated by the seasonal nature of the sport and the prevalence of outdoor venues during periods of rising temperatures.

從營運角度來看，這一趨勢被視為增加球場活力與出席率的潛在催化劑。數據顯示，大聯盟每場比賽的觀眾人數比去年增加了約 1,000 人。若此趨勢持續，大聯盟每場平均出席人數可能會達到 30,000 人，這是自 2016 年以來未曾見過的指標。由於棒球運動的季節性特質，以及氣溫升高期間戶外場地的普及，進一步促進了這一做法的採納。

The 'Tarps Off' trend continues to expand across multiple MLB franchises, integrating collegiate-style atmosphere into professional sporting events.

「脫衣」趨勢持續在大聯盟多支球隊中擴展，將大學風格的氣氛融入職業體育賽事中。