Kevin Jones went through a workout Saturday while four NFL teams watched the running back sprint and cut just five months after he had major knee surgery, as reported by the Associated Press. Dr. D.S. Ping, who has been helping Jones rehabilitate his right knee, said Miami, Green Bay, Pittsburgh and Detroit sent representatives to the workout in Saline, Michigan. The Lions cut Jones in March with one year left on his contract after he hurt the knee late last season, adding to the injury woes that have stunted his success. The Cleveland Browns also called, Ping said, and asked for a video of the workout.