Friends of Denny Send Greetings By Klem Web Team - Apr 1, 2021 Friends of Denny wish him well: https://klem1410.com/wp-content/uploads/2021/04/callahan-memory-mxx-2021.mp3 Henry Ortmann tribute: https://klem1410.com/wp-content/uploads/2021/02/henry-ortmann-memory-callahan-2021.mp3 KLEM Sports Director Denny Callahan has announced his retirement after 51 years in broadcasting: