Hard Knocks is a reality sports documentary produced by the NFL and HBO. Each season the show follows an NFL team during training camp in preparation for the upcoming season.Hard Knocks is a reality sports documentary produced by the NFL and HBO. Each season the show follows an NFL team during training camp in preparation for the upcoming season.Hard Knocks is a reality sports documentary produced by the NFL and HBO. Each season the show follows an NFL team during training camp in preparation for the upcoming season.
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