The Bears got mixed news on rookie right tackle Gabe Carimi.
He isn't lost for the season but tests revealed that he dislocated his right knee, according to a league source.
There's not believed to be any further damage. The projection is that the injury may sideline him for four weeks.
According to Web MD, a dislocation of the knee is rare, occurring after "major trauma."
"The bones of your calf (the tibia and fibula) get moved compared to the bone of your thigh (femur)," according to Web MD. "The bones of your knee are held together by strong bands of tissue, called ligaments. For a knee dislocation to happen, these bands have to tear."
The suggestion is that immobilization is necessary, usually requiring crutches.
Web MD also suggests that many dislocations require surgery. But it's unclear if Carimi will need it.
This may sound eerily familiar to the Bears.
In 2002, Marc Colombo, the 29th overall pick of the Bears, suffered a dislocated knee but also suffered femoral nerve damage in November. He was placed on the injured reserve and also missed the entire 2003 season.
After appearing in the 2005 opener, Colombo was waived by the Bears and signed by the Dallas Cowboys, where he started all 16 games for three consecutive seasons.
He's now with the Miami Dolphins.