IF he was injured due to some unsafe condition at the speedway, such as a poorly maintained track with potholes, he could potentially sue for his medical bills, for lost wages, or "pain and suffering" if he suffers long-term, significant disability or life impairment. But the key is, the track must have been at fault in some way. If the track was not at fault, they are not liable--so if the track had nothing to do with the accident, he cannot hold them responsible for it.