Tony Stewart is serious about Sprint Cup team ownership -- serious enough that he's able to resist the allure of one great race that he's never won, but still calls to him year after year. As his own boss, there'd be nothing to stop him from turning his NASCAR vehicle over to someone else for one weekend next May, and resuming the chase for that Indianapolis 500 victory that's teased and eluded him over the course of his otherwise illustrious career.