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NFL 100: At No. 97, Jim Otto led the Raiders with his sweat, tears and a lot of blood - The Athletic
1980 San Diego Chargers season - Wikipedia
1980 Oakland Raiders, The Unlikely Super Bowl Champ, by Mark Morthier — Old School Sports
NFL 1980 01-11-81 Oakland Raiders at San Diego Chargers pt 1 of 2 AFC Championship
Oakland Raiders vs. San Diego Chargers, photo gallery, December 18, 2016
1980 Oakland Raiders AFC Championship game at San Diego Chargers
1980 San Diego Chargers season - Wikipedia
Greatest Moments: 1980 AFC Championship