The number twelve player of the Boca Juniors soccer club are its fans (Los Xeneizes).

Worldwide known for their loyalty to the "blue and gold" colors of the club, they are characterized for singing and cheering the team, before, during and even after every match. No matter how great the distance between games, they are always present for the club.

"La 12" is joy, carnival; they are the ones to make the entire stadium sing and with their pressure to the adversary make their presence remarkable, thus becoming player number 12. There are 11 players in each soccer team...

...but Boca plays with 12.