In September 2007, he suffered a knee injury which threatened to end his career. He was ruled him for the rest of the 2007–08 season, and most of the 2008–09 season.
The passage describes a significant knee injury suffered by the individual in September 2007, leading to his retirement from playing.  This injury impacted his participation for the remainder of the 2007-08 and most of the 2008-09 seasons.