ON 11-25-02, EE WAS EXITING THE MANTRIP & SLIPPED, TWISTING HIS RT KNEE. EE INFORMED THE FOREMAN OF THE INCIDENT & DENIED MEDICAL ATTENTION. ON 12-11-02 EE CALLED & INFORMED ME HIS KNEE WAS HU RTING FROM THE 11-25-02 INCIDENT. HE WAS TAKEN TO THE CENTER FOR OCCUPATIONAL HEALTH & EXAMINED BY DR SHIVELY & DIAGNOSED W/KNEE SPRAIN. WAS GIVEN KNEE IMOBILIZER TO WEAR & RELEASED TO RETURN