What happened: Chicago placed left tackle Braxton Jones on injured reserve after the right knee injury he suffered against Philadelphia in Week 3. Jones had already been ruled out for the Bears' Jets matchup, and the roster move formalizes his absence.

Why it matters: The move turns Jones' right knee issue from a questionable tag into a roster absence on Chicago's offensive line. Losing the starting left tackle adds another protection concern as the Bears head into Week 4.

What to watch: Chicago's next game-day inactive list will show how the Bears fill Jones' spot against the Jets. Any follow-up move on the practice squad or 53-man roster would signal whether the club wants another tackle in the mix.