EE was assisting another EE in carrying a piece of 20"" ventilation tubing to the #3 face. As he was doing this, he felt a pain in his left shoulder. EE continued to work until 4/2/10, when he sought medical attention for his injury. EE was told by doctor to stay off work until seen by an orthopedic surgeon for further eval. 1st day off work was 4/5/10.