It's more likely that Crain will throw another side session on Saturday after receiving extensive treatment, and then the White Sox will decide if he goes on the disabled list.
"I'm not hoping so," said Crain, who has not pitched since Friday in Seattle. "I think I can rid of it pretty quick. It's definitely recovered.
"That's a decision not up to me. I understand how it is when you've got guys down in the bullpen, especially after a game like yesterday. Me personally, I don't want to leave them out to dry. That's a decision that's going to be made, but I think it's definitely sooner than later."
Crain has a 2.57 ERA in six games and had recovered without a hitch from a strained right oblique that sidelined him for nine games during Spring Training. But this injury stemmed from a workout, not from mound work.
"I pride myself on being ready every day and working hard to be ready every day," Crain said. "The first one happened in Spring Training.
"All right, I was able to get through it. And then getting through that one and the other side, kind of tweaking, not even throwing, something getting ready for the next day, it happened. It is pretty frustrating."