Mason Crosby is kicking at a success rate of 58.6 percent with his next closest peer being David Akers at 71.4 percent.
Crosby has missed at least one field in goal in each of the past six games, including two from inside 45 yards against the Bears.
"We're not changing our kicker, so you can write that down right now," McCarthy said. "He's our guy. He needs to make those kicks. He knows that. We're at that time of year."