But there is a risk, he admitted.
"I don't know the exact science, and no one knows the exact percentages. That's what makes this really, really hard," he said. "But, as far as I've been told, I understand it would take such a significant hit that you probably would be injured from it even if you were 100 percent healthy. I've got to let the doctors speak for that a little bit more than me because I don't know the risks exactly and neither do they. We're just trying to buy myself another week obviously until Darlington, but the risk is so minimal that it's almost not even there."