<p>Quietly, deep in the shadows of Madden covers, pass-rush fretting and splashy newcomers, cornerback Jaylon Johnson is one of <a class="Link" href="https://chicago.suntimes.com/bears" target="_blank" >the Bears</a>’ absolute most important pieces for the upcoming season.</p><p>Hardly anyone thinks of Johnson when analyzing the Bears’ concerns and it’s easy to forget about a player whose best talent is subtly making opposing wide receivers disappear. But as he works back from a core-muscle injury that wrecked nearly all of last season, the Bears are depending on Johnson more than they have in years.</p><p>For a defense with a lot to prove, and with Johnson the second-most expensive player on the roster at a salary-cap hit of $24.5 million, they desperately need him to be the lockdown corner he was before the injury.</p><p>“He's a vital part of what we want to do,” coach Ben Johnson said before minicamp practice Wednesday. “You know he's been a Pro Bowl-caliber player in the past, and hopefully we can get that out of him again this year.”</p><p>Last season was so stilted for Jaylon Johnson that his coach wasn’t able to get much of a read on him.