KKRT has changed its name various times since its debut. KKRT first went on the air as KSGA on the first of July 1985, but changed its call sign to KEYK in early January 1987. On the thirteenth of October 1988, the call sign was changed again to its current name of KKRT when it changed from its classic country format to old standards as "K-Heart".[3]
In 1993, the station dropped the standards format, and carried the audio feed of CNN Headline News. It was rebranded as "CNN AM 900".
In 1996, KKRT became the full time Mariners affiliate, and changed to an all sports format as "SportsRadio 900" carrying programming from One-on-One Sports and ESPN Radio. The station also later picked up the local rights to WSU football (which ended in 2015, when the broadcasts moved to KPQ) and the Sonics (which ended after the 2006–07 season, one year before the relocation to Oklahoma City).
In 2000, KKRT dropped One-on-One and started carrying the entire ESPN Radio schedule.
In 2021, KKRT replaced most of ESPN Radio's weekday programming (from 6-10 AM and 2-6 PM PT) with Brock & Salk and Wyman & Bob from Seattle Sports 710.[4]