It's turning out to be a terrible Friday for the Chicago Bears. 

They've already announced that two key pieces of their defense are done for the season, Danny Trevathan and Khalil Mack. 

Now they've lost a key piece to their offense. 

While he's not done for the season, it doesn't sound likely that he'll play this weekend. 

The Bears announced that wide receiver Allen Robinson is doubtful for this weekend's game against the Baltimore Ravens. 

The Bears' wide receiver is dealing with a hamstring injury. 

More details to come.