The Detroit Lions are going to be without defensive back Brian Branch this week because he punched an opponent after their most recent game, earning a one-game suspension from the NFL . Another one of their star defensive players, linebacker Jack Campbell, is drawing attention for his bad habit of accidentally punching players during games.

Jack Campbell used as an example on the NFL's "punch-out" emphasis

The NFL sent a memo out to its 32 teams this week, warning players that when they are attempting to punch at the football in an attempt to force a fumble, they have to make sure they are hitting the ball. Not the ball-carrier.

Campbell was used as a prime example of what not to do.

The league is going to be enforcing personal foul penalties for defenders who punch the ball-ca

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