This article is part of our Injury Analysis series.
Trubisky is out after suffering a left shoulder injury Sunday. The Chicago quarterback dislocated his left shoulder when he fell on his outstretched arm following a sack by Vikings defensive end Danielle Hunter. He left the game and did not return. Further testing revealed the forced dislocation resulted in damage to the fibrocartilage rim of the shoulder known as the glenoid labrum.
The labrum surrounds the head of the upper arm bone, the humerus. The humeral head acts as the ball in the ball-and-socket joint of the shoulder, with the glenoid cavity of the shoulder blade serving as the socket. The labrum deepens the socket while allowing for a high degree of mobility. Unfortunately, the cost of mobility is often stability ,as the glenohumeral joint can easily become misaligned or dislocated. The force needed to cause a dislocation often tears the labrum.
Labral injuries can come in a variety of types and directions with surgical intervention needed for the more serious tears. Fortunately, it appears as though Trubisky will avoid a trip to the operating room and should return this season.
Part of the reason for a sense of optimism surrounding the injury is linked to the fact that the involved joint is on Trubisky's non-throwing shoulder. He will spend the next few weeks rehabbing with a focus on regaining range of motion and strengthening the surrounding musculature. A well-timed bye in Week 6 will help minimize his time lost and return in Week 7 against the Saints