Still facing the possibility of season-ending surgery on his right shoulder, San Francisco 49ers' starting quarterback Alex Smith is scheduled to go through some light throwing drills Wednesday and Thursday, and doctors will then re-evaluate him by the end of the week. It was expected that Smith would be re-examined early this week, either by noted orthopedic surgeon Dr. James Andrews or 49ers' team orthopedist Dr. Tim McAdams, in an attempt to reach some clarity about the condition of his throwing shoulder and forearm. But the plan now is for Smith to throw for at least two days without cutting loose at full velocity before the doctors review his case. That review, which will come after getting some feedback from Smith on how his arm feels, will probably be conducted on Friday and likely by phone. There are no current plans for Smith to revisit Andrews in Birmingham, Ala., where he traveled Nov. 20 to have his shoulder examined.