As season nears, Bears full of uncertainty at cornerback — sound familiar?

Johnson has been solid in his two seasons as a starter for the Bears. (AP Photos)

This should be a straightforward question for any defensive coordinator: How many of your dozen or so cornerbacks do you trust?

“I’m still not sure yet,” the Bears’ Alan Williams said Sunday. “I’m really not. I think I know where you’re going: You may say, ‘Well, is that Jaylon Johnson? Has he earned it?’ None of our guys has played an entire ballgame.