They really dropped the ball on character designs. There's three Isagis running around the field. You have to actually pay attention to the details like the jerseys and Rin's eyes, otherwise it gets confusing.
And 'paying attention' is something I don't do while reading Blue Lock, because then I start to notice the stupid shit like how Isagi bumped with Rin and he is suddenly reminiscing his childhood memories like it's Attack on Titan or some shit.