|League||Midwest Professional Basketball Association|
|Team history||Central Illinois Drive (2011–2012)|
Bloomington Flex (2012–present)
|Based in||Bloomington, Illinois|
|Colors||Navy blue, sky blue, gold, white|
|Head coach||AJ Guyton, Carlnel Wiley, Dee Brown|
|Championships||2 (2012 and 2013)|
|Division titles||3 (2012, 2013, 2014, 2015)|
|Dancers||Alice Starks, Amber Kashner, Ashley Lions, Rachel Lorance, Rachel Schroen-Aupperle|
Formed in 2011 as the Central Illinois Drive, they were a member of the Premier Basketball League (PBL) for three seasons.
The Flex played the 2012 PBL season as the expansion Central Illinois Drive. The Drive finished the 2012 regular season 18-1 and swept the Scranton/Wilkes-Barre Steamers in the first round of the PBL playoffs. On April 14, 2012, the Drive completed a two-game sweep of the defending PBL champions, the Rochester RazorSharks, at U.S Cellular Coliseum in the PBL Finals to win the 2012 PBL Championship.
Despite their success, Drive owner Jim Morris decided he no longer wanted to own the team after just one season of play. Scott Henderson, the Executive Vice President of the Drive, wanted to take over the team, but he and Morris could not come to an agreement about the use of name and logo for the Drive. Henderson and his management team then decided to reboot the entire operation. On December 1, 2012, Henderson announced  the new franchise as the Bloomington Flex.
The Flex logo, uniform prototype and colors were announced at a news conference  on January 18, 2013.
Prior to the start of the 2013 season, the PBL merged with the Independent Basketball Association (IBA), to create the IBA-PBL.
The Flex opened the 2013 season on March 15 against the Sauk Valley Predators, losing on the road 100-94. The Flex then dropped their home opener on March 29 to the Gary Splash, spoiling their championship banner-raising ceremony. But the team regrouped and went on to win ten of its next twelve regular-season games.
As the season wore on, the owners of the PBL's franchises became increasingly unhappy with either playoff structure suggested by Barry Bradford, the IBA-PBL commissioner who owns the IBA's Kankakee County Soldiers franchise and who had served as the IBA commissioner before the leagues merged. The PBL teams were also displeased about instances of IBA teams failing to appear for scheduled games against PBL teams over the final two weeks of the season. And so with less than two weeks left in the regular season, on May 24, 2013, the four top former PBL teams (Bloomington, Rochester, Indiana Diesels and Sauk Valley) broke away  from the IBA to re-establish the PBL and hold a four-team playoff, identical to the PBL's 2012 format.
In the 2013 playoffs, the Flex swept the Indiana Diesels in two games, and then, on June 9, completed another two-game sweep of the Rochester RazorSharks, 106-86 and 88-77, winning the first game in Bloomington and then clinching the PBL title at Blue Cross Arena in Rochester. In the two wins, the Flex defense held in check the RazorSharks high-scoring offense, which had averaged 118.5 points per game in the regular season.
The Flex finished the 2014 season with a perfect 18-0 record, winning the PBL Midwest Division championship and earning the top seed and home-court advantage throughout the playoffs.
When league officials realized the championship series, as scheduled, would take place over Easter weekend, at the request of Mr. Henderson and the Flex, the league agreed to move the playoff schedule up by one week. The change resulted in a facility conflict for the second-place team in the East Division, the Carolina Pee Dee Vipers. Carolina had no available dates in its arena, the Florence Civic Center, and when the league proposed the entire series be played in Rochester, Carolina refused.
The league canceled the entire first round of the playoffs—including the Midwest series between the Indianapolis Diesels and Bloomington Flex, and announced the finals would start April 6 in Rochester. However, Bloomington was contractually locked into two dates at its arena, U.S. Cellular Coliseum, on April 4, which had originally been scheduled as a regular-season game against the Lima Express, and April 6, which the team had booked when the playoff schedule was announced.
Bloomington, the two-time defending league champions, balked at having to play what was amounting to an exhibition game Friday, travelling Saturday, and then playing Sunday afternoon in Rochester, even though the league offered to pay all expenses to fly Bloomington to Rochester on Saturday.
While the two sides were still negotiating for a way for Bloomington to appear in Rochester the league abruptly announced on April 3 that Bloomington was disqualified from the playoffs and suspended for the entire 2015 season “due to its unwillingness and inability to participate in the championship series.”  The league also announced that Bloomington would be replaced in the finals by second-place Indianapolis, despite refusing to consider having the third-place Buffalo 716ers replace Carolina in the first round.
On April 28, 2014, the PBL terminated its agreement with the Flex due to actions detrimental to the league allegedly caused by owner Scott Henderson up-to and following the suspension. Mr. Henderson had a prior contract with the US Cellular Coliseum and could not just randomly break. The owner of the League had a similar contract in Rochester that he chose to honor. The FLEX had won the PBL each of the prior 2 seasons and were clearly again on track to beat Rochester again. General consensus was that Rochester did not want to have to play the Bloomington FLEX again since they had never beaten them before. The Rochester team was in total disarray during the playoffs with in-fighting amongst the coaching staff and players ultimately leading to the firing, during the playoffs, of then head coach Lawrence Moten. This fact was never made public but was widely known in basketball circles. Many of the seasons since the inception of the PBL ended in this same state of confusion.
The Flex played in 2015 as a founding member of the new Midwest Professional Basketball Association (MPBA). On December 27, the team announced that Carlnel Wiley, Jr. would replace Guyton as the team's head coach. 
In October 2015 it was reported that the franchise would sit out the 2016 season due to the instability of the available leagues. 
2017 Once again, the Bloomington FLEX were invited by the Chinese Basketball Federation to participate in a tour in May and June. The FLEX played against teams from China, Serbia and Nigeria. During the curse of the tour the FLEX played ten games and won 8. The FLEX have amassed a record of 17-4 during their China tours. The 2017 team was coached by University of Illinois and 2005 National Player of the year Dee Brown. The FLEX were led in scoring during the tour by Crandall Head, former SMU star. Chris McClellan, FLEX point guard, set a new team record during the tour by making 9 three pointers in a victory against the Serbian All Stars.
- "Former Drive exec Henderson to launch Flex as new team". Pantagraph.com. 1 December 2012.
- "Bloomington Flex unveil team logo to the public". Pantagraph.com. 18 January 2013.
- "IBA, PBL to part ways". Pantagraph.com. 23 May 2013.
- "Bloomington Flex Expect to Play in 2015". Central Illinois Proud. 4 April 2014. Archived from the original on 24 December 2015.
- "Flex hire D-League vet as Guyton departs after three seasons". Bloomington Flex. 27 December 2014.
- "Bloomington Flex to take 2016 season off, reassess future". Pantagraph. 30 October 2015.