The Life And Sad Death Of Bob Kalsu (Complete Story)
All of us owe former Sooner, Vietnam vet Bob Kalsu a moment
The Tragic Death of Bob Kalsu, the Buffalo Bills Player Serving in Vietnam
Memorial Day Salute: The Price Bills' Bob Kalsu Paid for 'a Promise to Serve' - Talk Of Fame
A Name On The Wall: Bob Kalsu was the only U.S. pro athlete to die in Vietnam - Sports Illustrated
Bob Kalsu Spent His Life in the Trenches, Both in the NFL and Vietnam - FanBuzz
History of the Buffalo Bills - Wikipedia
When Professional Athletes Went to War
1LT James Robert Kalsu, Oklahoma City, OK on The Virtual Wall® Vietnam Veterans Memorial Wall
List of NFL players who had their numbers retired because they died or suffered a career ending injury : r/nfl