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Hard Knocks 2021: When does HBO series start, what team, what dates will it air, what time, how many episodes? - DraftKings Nation
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![Michael Gehlken on Twitter: "NFL Films sent about a 30-person crew to Oxnard for the Cowboys' “Hard Knocks” season. Group wearing these shirts. Filming has begun. https://t.co/NtBP9i5v4A" / Twitter Michael Gehlken on Twitter: "NFL Films sent about a 30-person crew to Oxnard for the Cowboys' “Hard Knocks” season. Group wearing these shirts. Filming has begun. https://t.co/NtBP9i5v4A" / Twitter](https://pbs.twimg.com/media/E60_PG6UUAUPrmW.jpg:large)
Michael Gehlken on Twitter: "NFL Films sent about a 30-person crew to Oxnard for the Cowboys' “Hard Knocks” season. Group wearing these shirts. Filming has begun. https://t.co/NtBP9i5v4A" / Twitter
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Hard Knocks' 2021: Ranking the five NFL teams eligible to be featured on HBO's summer series - CBSSports.com
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