The station's initial weekday on-air staff includes Denver radio veteran Hal Moore from 6 to 10 a.m., Bill Press from 10 a.m. to 2 p.m., former KIMN and KXKL-FM deejay Randy Jay from 2 to 6 p.m. and Chuck St. John from 6 to 9 p.m., Wolfman Jack 9 to 10 p.m.
The station was previously known as KIMN from 1954 to 1988, and was Denver's top-rated top-40 outlet. After KIMN's demise, the station flipped to Country and adopted the KYGO calls beginning on April 26, 1988. The programing was separate from its FM sister. On October 12, 1994, the station changed its call sign to KKFN, with the moniker "AM 950 The Fan" and carried a sports format. Lincoln Financial moved the sports format to FM at 104.3 MHz. Finally on September 2, 2008, the AM station became KRWZ with an oldies format.