LAKE FOREST, Ill. -- Sunday’s loss in Seattle created even more questions for the 0-3 Chicago Bears, beginning at quarterback, where Jimmy Clausen managed to pass for just 63 yards.

John Fox’s options are slim. If Jay Cutler (hamstring) misses another week, Fox has to either give Clausen another start or go with second-year quarterback David Fales when the Oakland Raiders visit Soldier Field on Sunday.

David Fales hasn't played in a regular-season game, leaving the Bears unsure of what he can do. AP Photo/Nam Y. Huh

The book is out on Clausen. The Bears know exactly what Clausen’s strengths and weaknesses are.

On the other hand, Fales is the unknown in this whole equation. A 2014 sixth-round pick out of San Jose State, Fales has never appeared in a regular-season game.

“Being really honest with you, I really haven’t gotten a chance to work with him much,” Fox said. “He had a shoulder issue in the offseason that he had gotten well. He had a bit of a setback with an illness where he missed some time. So I was impressed with him when we threw him in the fourth preseason game against Cleveland, and I’ve been impressed with how he went about preparing himself being on and off the 53 here in just three weeks. So obviously we think well enough of him in bringing him up to the 53 both times.”

Does Fox think enough of Fales to start him in Week 4?

“I would consider starting anybody on the 53-man roster,” Fox said. “That’s why they’re here. I think, obviously, we want to pick the best 11 whenever we deem that to be. And we won’t know that until we check the injury report on Friday.”

Regardless of what happens in Week 4, the Bears would be wise to eventually look at Fales. With so many NFL teams hurting at backup quarterback, Fales may possess the traits and intelligence to be a sturdy No. 2. But the Bears will never know until Fales plays in an actual game.