After two years of offering baseball as a club team, President Dr. Joe Wiley announced the university was accepted into the National Association of Intercollegiate Athletics (NAIA) in September 2005.

[4] On July 13, 2012, Dr. Larry Rice announced that then Director of Athletic Ryan Bradley was notified that the university had been approved for the Division II membership process.

After his departure to Northwest Missouri State for a similar position Baker was replaced by Ryan Bradley, previously the Associate Athletic Director for External Relations.

On August 1, 2016, Erwin announced his resignation to accept the vice president and director of athletics position at East Texas Baptist University (NCAA D-III).

[17] On December 6, 2017, Parkinson announced his resignation to accept the lead assistant coach position with the NWSL's Real Salt Lake.

Williams began the program in March 2007 and helped lead the Hillcats to back-to-back NAIA National Tournament appearances before taking the same position at the University of South Dakota.

Bradley led the Diamond Cats back to the NAIA World Series in 2013 before retiring following the 2014 season compiling a 281–188 collegiate coaching record.

[23] Fosdick resigned in July 2016 after accepting the men's golf head coaching position at the University of Central Oklahoma.

[27] Their mascot, a fictional animal based on a bobcat and named for the hill that the school sits upon, was chosen in 2005 by a group of students.