Ryan Poles in no rush to upgrade Bears’ defensive line

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Defensive end DeMarcus Walker (95, sacking Bengals quarterback Joe Burrow) had seven sacks for the Titans last season.New Bears defensive end DeMarcus Walker was “abso-[expletive]-lutely” engaging, ebullient and quotable at his introductory press conference last week. But when it came to the crux of the matter — “How effective will you be in Matt Eberflus’ defense?” — he pretty quickly put on the brakes.

“Obviously, it takes two things. It’s not just me,” said Walker, who signed a three-year, $21 million contract as a free agent. “It’s the coaches putting players in good positions to make plays and me going out and trusting the game plan and my skills. So I…