Audax Castelletto F.C.

Audax Castelletto Football Club, commonly known as Audax, is a Lammarese sports club based in Castelletto, in the state of Quattrocastelli. It is part of the Audax Atletica Sports Club, which is present in football, baseball, basketball and rugby union. Founded in 1914, making it one of the oldest clubs in Lammari, its soccer section has won 31 L1.League titles and 12 national cups; it also holds the distinction of never having been relegated from the top league. The reserve team, Audax Castelletto FC B, currently competes in L2.League.

Their traditional rivals are Fortitudo FC and US Stemburghese.