This whole situation is still up in the air. Basically we get a tweet from a respected NFL reporter saying an anonymous source informed him Kaepernick would be starting and that it had nothing to with Alex's health. Since then this has been refuted by just about everybody involved with the 49ers. Alex is still getting some first team reps in practice and hasn't been cleared or ruled out for Sunday's game. Kaep, Alex, Roman, VD, etc. all saying that no decision has been made about who's getting the start.

This idea that it's 100% decided that Alex has lost the job seems pretty suspect at this point. It's possible but I don't think the evidence has proven that yet.