Panathinaikos
That is debatable. Michigan has had the most fans in a stadium in a game, and there are fans growing everyday.
Persepolis is the greatest pro football team.
LIVERPOOL
Most likely the pittsburgh steelers
It could possibly mean that both the club and fans are united.
San Francisco 49ers
Brazil
Dallas Cowboys
PSG by a long distance
Michigan
Celtic Fc has the most fans followed by Rangers FC! mon the hoops:D