A new survey by Casino.ca ranks MLB fanbases on baseball knowledge tied to rival matchups. According to the reporting, the study draws on responses from about 5,000 fans who complete a 20-question baseball knowledge quiz. The results place New York fanbases at the top: Mets and Yankees fans are reported to tie for No. 1, each scoring 18 out of 20. The coverage also indicates that the Yankees and Mets match up as principal “biggest rivals” for fans, with both groups outperforming others in the survey’s top range. Additional rankings mentioned by sources include attention to other large-market teams’ fanbases, such as Dodgers and Giants supporters, which are grouped in the discussion of upper-performing categories. The overall framing across outlets is that the quiz and survey are designed to test whether fans are “smarter” than their team’s biggest baseball rival. All descriptions emphasize that the ranking is based on quiz performance rather than official player or team metrics.