In this article by Patrick Saunders of The Denver Post, you can get a good idea of the nature of the injury, which is being described as a stress reaction of his sixth rib. He will be re-evaluated in a couple of weeks to see how the healing is doing.
Until then, Dahl can only do what he can to stay in game shape, which he says includes eating right and working in the weight room on his legs.
“It’s unfortunate but it happens. I have to prepare and get ready to come back in any way I can,” Dahl said.