I think it's safe to say that 2021 is pretty wide open. Any of the guys expected to run out of eligibility then could either be back, or not, next season. Plus Adams, Sid and Cole will have grad transfer eligibility (assuming Adams completes his degree). So we don't really know what the 2021 landscape is going to look like. This spring and off-season could be quite interesting.
People talk about Polley redshirting next year, but a redshirt still burns a scholarship. I don't think Hurley wants Polley to consume two more years of scholarships. I know I don't. I'd be surprised if we have a spot for him on the 2021-22 roster.