Although he previously broadcast Mariners games on both television and radio, Rizzs was transferred prior to the 2007 season to work exclusively on Mariners radio broadcasts.
During the 2011-2012 seasons, Rizzs did broadcasts of Mariners baseball with rotation of guest color commentators, including former Mariners Dan Wilson and Jay Buhner, and former Mariners announcers Ron Fairly, Ken Wilson, Ken Levine, and Dave Valle.