In August 2012 the Minnesota Atheists partnered with the American Atheists to hold a regional conference and sponsor a St. Paul Saints game. The team changed their name to the secular-friendly "Mr. Paul Aints" as part of "A Night of Unbelievable Fun". The St. Paul Saints' general manager reported some complaints, mostly from out of state. A representative from the group stating that "sponsoring a baseball game seemed like a good way to show that apart from religion, atheists are like everybody else." A second game was sponsored by the Minnesota Atheists in 2013, "A Night of Unbelievable Fun, The Second Coming". The general manager states "We're looking forward to being an "Ain't" for the day." The Minnesota Atheists partnered with Foundation Beyond Belief in 2014 for the third atheist-themed St. Paul Saints game. It became the first game the secularized Mr. Paul Aints team won, which took 11 innings to do, and the last "Mr. Paul Aints" game to be played at Midway Stadium.
On Saturday, August 8, 2015 the Minnesota Atheists teamed up with Foundation Beyond Belief to hold the fourth consecutive year of atheist-sponsored minor league baseball at the new home of the St. Paul Saints, CHS Field. A shoe drive benefiting Soles4Souls was incorporated into the event (promoted as "Leave Your Soles at the Gate"). The team beat the Winnipeg Goldeyes 7-4 in front of 8,500 fans at CHS Field which brought the record of the Mr. Paul Aints to 2 wins and 2 losses. The Mr. Paul Aints won again in 2016, but lost in 2017 bringing their record to 3 games won and 3 games lost.
In 2018, after six years straight, the Minnesota Atheists and Saint Paul Saints mutually agreed to end the annual sponsorship. Though not eliminating the option of St. Paul Saints sponsorship in the future, the Minnesota Atheists are looking into other means to provide visibility.