VIDEO: Detroit Lions 'Hard Knocks' trailer released by NFL Films - Pride Of Detroit
Hard Knocks will feature the Detroit Lions this summer
2012 Detroit Lions Media Guide, PDF, National Football League
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Hard Knocks: Training Camp with the Detroit Lions (TV Series 2022– ) - IMDb
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Hard Knocks will feature the Detroit Lions this summer
HBO Sports, NFL Films and the Detroit Lions Join Forces for Hard Knocks: Training Camp with the Detroit Lions, A New Season of the Groundbreaking Sports Reality Series, Debuting August 9
Detroit Lions To Be Featured On HBO Series 'Hard Knocks' - CBS Detroit