The Denver Broncos offense has been unimpressive in their preseason opener against the Chicago Bears, but the defense is in midseason form.

On the first drive of the game, Broncos cornerback Chris Harris intercepted Bears quarterback Mike Glennon and returned it 50 yards for the game’s opening score.

Glennon played a few more series for Chicago and went 2-8 for 20 passing yards. He had no touchdowns and the above interception.

Glennon left the game in favor for Mark Sanchez in the second quarter after posting a quarterback rating of 0.0, according to Andrew Mason of the Broncos’ official website. That’s a 0.0 out of a possible 158.3.

Glennon, who signed a three-year, $45 million contract with the Bears this offseason, owns a 84.6 career passer rating. He spent the first four years of his career with the Buccaneers, serving mostly as a backup since the 2014 season.

Fans in Chicago are probably hoping rookie Mitch Trubisky is ready to play sooner rather than later. Though Trubisky probably wouldn’t have done much better against Denver’s elite secondary on Thursday.