The Chargers placed Lambert-Smith (hamstring) on injured reserve Tuesday.
Lambert-Smith suffered a significant hamstring injury during the Chargers' Week 1 loss against the Cardinals, warranting a stint on the IR. As such, the second-year pro will be required to miss at least the next four games and is eligible to return for Week 6 against the Chiefs on Sunday, Oct. 18, though he may need more time to recover. Gary Jennings was signed to the Chargers' 53-man roster in a corresponding move.