The Acadiana Mudbugs, Austin Turfcats, Houma Conquerors, Texas Hurricanes, and Louisiana Swashbucklers are the teams that comprised the first season.

The inaugural SIFL season concluded with the President's Cup Championship Game which saw the Louisiana Swashbucklers defeat the Austin Turfcats 59-38.

The loss of the Austin Turfcats, Houma Conquerors, and Texas Hurricanes were countered with the addition of the Albany Panthers, Columbus Lions, and Greenville Force.

With the exit of the Force, the SIFL added the Alabama Hammers, Houston Stallions, Mobile Bay Tarpons, Rio Grande Valley Magic, and Trenton Steel for the 2011 season.

On November 9, 2010, the SIFL announced its merger with the East Division of the American Indoor Football Association, adding the Carolina Speed, Erie Explosion, Harrisburg Stampede, and Richmond Raiders.