The Panthers placed Greene (neck) on injured reserve Monday.
As a response to Greene's placement on IR, the Panthers signed Bryan Witzmann to provide depth along the offensive line.
Greene (neck) is ruled out for Sunday's game against the Cardinals, Brendan Marks of The Charlotte Observer reports.
Greene's absence will be a blow to the Panthers' offensive line depth, as the team works to protect Kyle Allen under center.
Greene (undisclosed) wasn't listed on the Panthers' injury report Wednesday, Brendan Marks of The Charlotte Observer reports.
Greene suffered his mystery injury during the team's second preseason game, and he's finally back at full health. The 25-year-old will add depth to the offensive line this season.
Greene left Friday's preseason game against the Bills prematurely due to an undisclosed injury, Joe Person of the Athletic reports.
The nature of Greene's injury is unclear at this point, but he could be in danger of missing the Panthers' third preseason contest against the Patriots on Thursday.
Greene signed a contract with the Panthers on Monday, Bryan Strickland of the team's official site reports.
Greene showed well with the Brimingham Iron before the AAF collapsed. The 6-foot-5, 290-pound offensive tackle spent time on Chicago's practice squad as an undrafted rookie in 2017 but didn't appear in a game despite being promoted to the active roster late in the season.
Greene was promoted to the Bears' 53-man roster Saturday.
Greene has been on the Bears' practice squad since roster cutdowns but will have his opportunity for the final two weeks of the season. The 27-year-old should serve in a reserve role on the interior of the Bears offensive line.