EE woke up 11/19/20 with pain in neck & worked all day. EE reported issue to mgt. 11/23/20. EE did not recall any specific incident causing pain. EE was pushing/pulling slabs on gravity roller conveyor leading to hyd. splitter. EE indicated EE did nothing at home to cause injury. Dr. report 11/23/20 indicates sprain of ligaments & strain of other muscles @ left shoulder upper arm.