Clarett sought summary judgment on the merits of his antitrust claim. The NFL asserted that Clarett lacked “antitrust standing” and, as a matter of law, that the eligibility rules were immune from antitrust attack by virtue of the nonstatutory labor exemption. The district court granted summary judgment in favor of Clarett and ordered him eligible to enter that year’s draft. The NFL appealed. How did the court rule on appeal? Why?