EE was in the process of setting/leveling unit #1 header. He tripped on a crib block causing him to fall. When he fell his left leg hit another crib block causing a laceration below his left knee. EE continued to work without pain. He seen his family Dr. on 5/1/14 due to pain in his left leg. The laceration had become infected. EE began missing work on 5/2/14