Courtesy of SI.com and Jeremy Kaufman of Bleacher Report
Part soccer, part rugby, part mixed martial arts, calcio fiorentino is a popular no-holds-barred game that is popular in Florence, Italy. First played in the 16th century, the sport has few rules and matches take place on a 100-by-50-meter sand pitch with goals running the width of the end zone. There are no timeouts or substitutions. It just might be the toughest and most brutal sport in the world.
There are 27 players on each side at any given time, and the objective is to score a goal; either by kicking or throwing the ball through the designated goal area. In addition, kicks to the face are forbidden. This is pretty much where the rules end.
Of the 27 players on each side, as many as ten of them are often considered brawlers. These players usually come from boxing, wrestling, and MMA backgrounds, and it is their job to essentially knock out the opponent. The brawlers from each side will usually ignore the whereabouts of the ball, and instead engage in combat with one another throughout the duration of the match.
The skill players on a calico fiorentino team generally consist of rugby and soccer players. The rugby players are typically utilized to carry the ball past the opposition, while the soccer players are there for tactical kicking and goal scoring. However, these players must avoid life-threatening attacks from the brawlers of the opposing team.