The league started operations in 2001, with many teams coming from Indoor Football League being bought the previous year and folding operations.
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Jacksonville Stallions – folded before playing a game, and evidently became the Green Cove Lions.
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Green Cove Lions – Evidently formerly the Jacksonville Stallions, they folded in 2007 before ever playing a home game.
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Southwest Louisiana Swashbucklers – Joined the Indoor Football League and shortened their name until joining newly created Southern Indoor Football League in 2009
The Staten Island Xtreme was a professional indoor football team that played in the National Indoor Football League in 2004, going 3-11.
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The IPFL led a troubled three year existence, and died after its 2001 season, with its most successful teams joining up with the National Indoor Football League.