Caleb Williams injury: Bears QB has Grade 2 hamstring strain, out 3-4 weeks

Update 9/27 : Williams has a Grade 2 hamstring strain, and is expected to miss 3-4 weeks, according to ESPN . He is out for Chicago's Monday Night game against the Philadelphia Eagles , and is slated to miss the following two games against the New York Jets and Green Bay Packers . The Bears face the Atlanta Falcons in Week 6, then play on Thursday Night Football in Week 7 against the New England Patriots — two possible options for Williams' return. Chicago's backup QB Tyson Bagent has been in concussion protocol. Either Bagent or Case Keenum will start for the Bears in Week 3 against the Eagles.

Update Monday afternoon : Williams "avoided any major injury to his hamstring," according to NFL insider Tom Pelissero . He hasn't been ruled out for Week 3 against the Philadelphia Eagles on Monday night yet. This seems like the best case scenario for the Bears. Ben Johnson called the injury "week to week."

Update : Williams will have an MRI on Monday to determine the severity of his hamstring injury, per Adam Schefter .

Caleb Williams looked like a potential MVP candidate during Week 1, as he led a Chicago Bears offense that hung 59 points on the board against the Carolina Panthers .

But the combination of weather in Chicago — and a Brian Flores-led Minnesota Vikings defense — has made for tougher sledding in Week 2.

And now the Bears quarterback could be dealing with a lower-body injury.

Williams had to be helped off the field after a short run midway through the fourth quarter, and the injury brought backup quarterback Tyson Bagent into the game.

You can see the moment here, as it appears Williams goes down with a non-contact injury:

The only sound you could hear after the play was Williams crying out in pain, as the Bears-heavy crowd at Soldier Field was stunned into silence. Williams as helped off the field, as Bagent entered the game.

Making matters worse, Chicago's possession stalled and a potential game-tying field goal was blocked, just as Williams was being taken to the locker room on a cart:

Now we wait on word regarding Chicago's star quarterback.

Update: The team is calling this a hamstring injury:

This is a developing story and will be updated.