KUSA — The longtime Denver Broncos announcer who coined the legendary “IN-COM-PLETE” chant died Wednesday.

Alan Cass was 77 years old.

He called games for the Broncos for 20 years. His final season was in 2007, but he continued to announce University of Colorado football and basketball games until his retirement in 2011.

In an interview with DenverBroncos.com, former Broncos’ Vice President of Public Relations Jim Saccomano had only high praise for his colleague.

“I thought he was the best public-address announcer in Colorado history,” he said.

Alan Cass, Curator of the Glenn Miller Archive at the University of Colorado Boulder.
Alan Cass, Curator of the Glenn Miller Archive at the University of Colorado Boulder.
Casey A. Cass, � University of Colorado BoulderAdministrative & Research Center � East Campus 3100 Marine Street584 UCBBoulder, Colorado

The IN-COM-PLETE chant stems from a game against the Kansas City Chiefs where quarterback Joe Bono kept throwing incomplete passes as the team got further and further behind the John Elway-era Broncos.

“And Alan was saying, of course, 'That pass by Bono was incomplete.' And there was such a rhythm to it that eventually in the third quarter the crowd just picked it up,” Saccomano told DenverBroncos.com.

Cass was tremendously active in the CU-Boulder community, and became an assistant athletic director in 1996.

He is preceded in death by his son Christopher Cass and is survived by his wife Sue Cass and son Casey Cass, according to an obituary posted on the CU Boulder website.

Cass’ funeral service will be private. In lieu of flowers, donations are asked to be made in his name to the Boulder County Parks and Open Space Foundation.