Yoichi Isagi's career could progress in several ways after Blue Lock. He may continue to play professional soccer, either in Japan or internationally, depending on the opportunities that come his way. Alternatively, he could transition into coaching, sports management, or even sports journalism, leveraging his experiences from Blue Lock to excel in a different aspect of the soccer industry. Ultimately, his passion and dedication to the sport will likely drive him towards a successful and fulfilling career path.