Apparently, the Cumulus-owned station flipped to their own "True Oldies Channel" format from ESPN Radio early this morning.
http://amarillo.com/blog-post/jim-lexa/2012-03-28/arrgh-did-amarillo-lose-its-espn-radio-affiliate
http://amarillo.com/blog-post/jim-lexa/2012-03-28/arrgh-did-amarillo-lose-its-espn-radio-affiliate