EE was loading obsolete pumps onto a pallet. While lifting a pump the EE turned to place the pump onto a pallet and felt pain in his left knee. No medical treatment sought at the time of the accident. EE was still having knee problems and was sent to a doctor on 12/10/10. EE rec. an MRI and saw a Ortho. Dr. on 12/22/10. EE is still working until his knee surgery on 2/15/11.