Determining which franchise has the worst attendance in Major League Baseball typically fluctuates year by year depending on team performance, market size, stadium capacity constraints, and rebuilding phases. Historically, franchises operating in smaller media markets or undergoing prolonged periods of roster retooling—such as the Miami Marlins, Oakland Athletics during their final years in their traditional home, or the Tampa Bay Rays—frequently populate the lower rungs of annual attendance leaderboards. The Marlins, despite playing in a modern ballpark in a major metropolitan area, have famously struggled to draw large crowds due to historical front-office turnover, pricing models, and intense competition from other local sports teams and regional entertainment options. Similarly, teams that find themselves in the midst of multi-year rebuilding cycles often experience steep drops in ticket sales as casual fans lose interest in watching a roster designed to lose games for future draft positioning. However, direct comparisons must always account for stadium capacity, as smaller venues naturally cap total turnouts compared to massive cavernous ballparks, meaning raw attendance numbers do not always paint the complete picture of fan engagement or percentage capacity.