The New England Patriots struggled in Mike Vrabel’s coaching debut, losing to the Las Vegas Raiders 20-13.

New England appeared to be an average team throughout the game, and CBS Sports’ John Breech graded every NFL team that played on Sunday, giving the Patriots a “C” grade.

“The Patriots rebuilt their defense this offseason, and if Week 1 was any indication, there’s still a lot of work to be done,” Breech wrote Monday. “On the bright side, the Patriots did hold the Raiders’ rushing attack to just 56 yards, but they had no answers for Geno Smith, who carved up New England’s secondary.

“The Patriots’ offense disappeared during the second half, where they simply couldn’t come up with any big plays. The unit went just 1 of 6 on third down in the final two quarters and 4 of 14 in the gam

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