Do HBO 'Hard Knocks' appearances actually help NFL teams? Detroit Lions are next test case

• Of 16 teams featured in "Hard Knocks" since 2001, 10 have picked up at least one win in the standings.
• The Chiefs had the biggest negative change, going from 9-7 in 2006 to 4-12 in 2007.
• The Browns gained 7½ wins in 2018; they were coming off the NFL’s second-ever 0-16 season.

Weeks of an unprecedented look into Detroit Lions training camp in Allen Park thanks to NFL Films’ "Hard Knocks" on HBO has led to, well, almost unprecedented hype. The lure of the familiar has boosted the Lions to the No. 2 favorite to win the NFC North at some casinos. (Which, yeah, is faint praise, but still surprising considering the Lions went 3-13-1 last season.)

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