The tight end was placed on the reserve/PUP list on Tuesday, which effectively ends his season before it begins. Miller is still recovering from a career- and life-threatening knee injury that knocked him out for most of 2017.
NFL Network Insider Ian Rapoport reported Chicago knew Miller could not play this season before signing him to a one-year, $458K contract Monday, but did so anyway.
"I'm feeling good," Miller told reporters Tuesday, per the Chicago Sun-Times. "Knee's getting stronger, really daily. I've been putting a lot of work in here just continuing to work on strengthening that area, everything around it. That's kind of the big thing about this is it allows me to have that opportunity to continue to do that. So I feel good and continue just getting stronger, get healthier. Time will tell. Just put everything into it that I can and kind of see see where that takes me."
A free agent prior to Monday's signing, Miller will now have the benefit of continuing his rehabilitation as a member of the Bears and with the hope of returning to full health, and eventually to the sidelines of Soldier Field.