Buffalo Bills' running back C.J. Spiller has been diagnosed with a sprained acromioclavicular joint, according to Jason La Canfora of CBS Sports. The recovery period is expected to be one to two weeks.
Spiller sustained the injury in Sunday's 24-14 victory over the Cleveland Browns, when the back was brought to the ground by Browns' safety Usama Young. He was unable to return to action and finished the day with 16 yards on four carries in addition to two receptions for 42 yards and a touchdown.
Head coach Chan Gailey stated that injured back Fred Jackson is expected to return to practice this week after missing time due to an LCL sprain sustained during Week 1 against the New York Jets. Gailey would not speculate as to whether Jackson would be available for Week 4's meeting with the New England Patriots, but did state that he was comfortable starting Tashard Choice.