Eyeshield 21, shounen sports manga/anime about American football. I'm catching up with the manga now. (I actually, started it quite a while ago, but the scanlaters were quite behind then.) I'd probably put it at #3 on my sports series list, behind Slam Dunk and Hajime no Ippo. PoT isn't even on that list because it is just too weird for a sports series.

I do hope to get into the fandom a bit once I'm caught up. But I doubt it will consume all my attention. Slam Dunk definitely would have, if the fandom weren't all but dead now, but it is, so.