Mike Glennon was absolutely atrocious in his preseason opener for the Chicago Bears. The high-priced free agent signing threw this ill-advised pick six in his first possession and ultimately finished the game with a zero quarterback rating.

Meanwhile, rookie No. 2 overall pick Mitch Trubisky dominated the Denver Broncos’ reserves to the tune of 18-of-25 passing for 166 yards and a score. He also added 38 yards on three rush attempts.

Despite this, Bears head coach John Fox noted Thursday night that the team’s quarterback depth chart will remain unchanged.

“Our depth chart is not going to change after one game. That’s a really good defense our first unit went against, probably one of the top three defenses in the league,” Fox said, via ESPN. “You have to look at a lot of different things. I can understand how you guys might think [we could make a change], but we’re not going to change a whole lot after one game.”

While Bears fans might be clamoring for Trubisky to start, Fox is 100 percent correct in his assessment. As to where Trubisky was going up against reserves, some of whom might not make the Broncos’ 53-man roster, Glennon was taking on one of the top defenses in the NFL.

Theoretically, the idea of moving on from a high-priced free agent after one preseason game makes little sense. Glennon completed 2-of-8 passes for 20 yards and an interception. He was also responsible for a lost fumble in just four drives on the night.

But the idea that Trubisky will perform at this level against starting defenses seems a bit foolhardy. Maybe he’ll see more action against starters moving forward in the preseason. And that would actually make sense. But one game in August should not change the team’s overall direction heading into the regular season.