The six charter members were: Bloomington Flex, Champaign Swarm, Chicago Force, Gateway Steam, St. Louis RiverSharks and Windy City Groove.

The league tipped off its inaugural season on January 2, 2015, as the St. Louis RiverSharks and Gateway Steam played at Family Arena in St. Charles, Missouri.

The St. Louis RiverSharks secured the top seed with a 16-4 record by virtue of a 3-1 season series win over the Bloomington Flex, who also finished 16-4.

The championship game, held April 10 at U.S. Cellular Coliseum was won by the Swarm 115-106, after trailing by as many as 17 points in the first half and by as many as 13 in the fourth quarter.

Champaign's Avery Smith was named Playoff Most Valuable Player after averaging 32 points and seven rebounds per game in the postseason.

On September 9, 2015, the Lima Express, which had played their first two seasons in the Premier Basketball League, were announced as the first-ever expansion team in the MPBA.

Windy City defeated Chicago Fury 109-106 on Dec. 20, and continued to use the name and logo in the ABA, despite a cease and desist letter issued by MPBA attorneys on January 7, 2016.

All-Defensive Team: Darius Smith (unanimous selection); Nate Fuqua, Terry Evans, St. Louis RiverSharks; Keith DeWitt, Anthony Slack; Marcus Goode.

All-MPBA Second Team: Cordaryl Ballard, Lima Express; Michael Rogers, Champaign Swarm; Al Rapier, Chicago Blues; Isiah Martin, Windy City Groove; Aaron Williams, St. Louis RiverSharks; Devon Jenkins, Windy City Groove.

All-Defensive Team: Jordan Walker, Champaign Swarm; Dion Cooksey, Windy City Groove; Jakeem Hill, Chicago Blues; Connell Crossland, Gateway Steam; Marcus Hammonds, Pontiac 66ers; Aaron Williams, St. Louis RiverSharks.