The National Indoor Soccer League (NISL) was an indoor soccer league plagued with internal controversy that began play in 2021 and was based in the Southeast United States.

[1] On March 24, 2021, the league announced its partnership with Nike yet internal sources state that the partnership never materialized based on the business practices of the NISL management and ownership.

[3] On April 29, 2021, the Memphis Americans were officially announced as a charter team in the new NISL[4] On June 7.

On December 16, 2021, 10 days before the season opener, the Rome (Ga.) Gladiators, a travel team, became the fourth and final team to join the league for its inaugural season.

[7] After endless controversy related to player and staff wages, safety, sponsorship fulfillment, and general business practices on the part of the league and its owner/director Andrew Haines,[8] on March 29, 2024, the league announced its merger with Major League Indoor Soccer with many staff and players never receiving their wages in full.