The 2011–12 Professional Arena Soccer League season was the fourth season for the American professional indoor soccer league, now using the nickname "PASL" instead of "PASL-Pro". The San Diego Sockers became the first team in league history to finish a season undefeated. The Sockers won their third straight PASL Championship and the first Ron Newman Cup trophy by defeating the Detroit Waza 10–7 at the Del Mar Arena, home of the Sockers.

Louisville Lightning was an American men's professional soccer club based in Louisville, Kentucky. The Lightning competed in the Professional Arena Soccer League, as a member of the Eastern Division. The club began play in 2009.