Joe Kapp, Quarterback Who Led Vikings to Super Bowl IV, Dies at 85 - The New York Times
Former BC Lions quarterback Joe Kapp dead at 85
Joe Kapp dead: Former Vikings QB passes away aged 85, cause of death revealed
NFL world mourns death of legendary quarterback
Joe Kapp, QB who led Vikings to first Super Bowl appearance, dies at 85 - CBS Minnesota
Vikings QB Joe Kapp passes. He helped build the Minnesota Vikings with Bud Grant.
Former Vikings QB Joe Kapp passed away at 85
Vikings QB Joe Kapp's Career Was Played With No Holds Barred - imaportsphile
Legendary Cal QB, coach Joe Kapp dies at 85 – Monterey Herald