He's expected to stay on til the end of the year, or until a successor is in place before that.
https://www.bizjournals.com/philadelphia/news/2018/07/09/steve-butler-kyw-newsradio-entercom.html
https://www.bizjournals.com/philadelphia/news/2018/07/09/steve-butler-kyw-newsradio-entercom.html