Lake Forest, Ill. ? Brian Griese is in. Rex Grossman is out.

Yet, despite numbers indicating the Chicago Bears needed to make a change with their starting quarterback, when it finally happened the news jarred Grossman.

He used words like “surprised” and “frustration” to describe his feelings when he learned Griese would be calling signals Sunday at Detroit.

“The frustrating part is I know this offense is close to getting in a rhythm and clicking, and I just wish I could have been the one pulling the trigger,” Grossman said Wednesday afternoon, hours after the Bears announced the change.

At 1-2 and with the league’s 30th-ranked offense, the defending NFC champions need to do something different. So they turned to Griese, a Pro Bowl pick with Denver in 2000.

“I’m excited for Brian,” coach Lovie Smith said. “He brings a lot of experience. He’s been a loyal soldier in a backup role up to this point. He’s anxious to go.”