Chicago Bears head coach Marc Trestman has revealed that quarterback Jay Cutler is out of their clash with the Baltimore Ravens this week.

Cutler returned to the Bears' lineup this week against the Detroit Lions after missing their win over the Green Bay Packers, but sustained a high ankle sprain in the defeat at Soldier Field after initially struggling with a groin problem.

Trestman told reporters: "[It's} week-to-week [but] it certainly won't be this week."

The Bears are already without several key players, including linebacker Lance Briggs and cornerback Charles Tillman, for the game against the Ravens.