Veteran Alex Smith is supportive of Colin Kaepernick's success, even if he takes Smith's job as starting QB for the 49ers.

Smith plans to fight for his job when healthy, and he had yet to be medically cleared as of Wednesday. Yet head coach Jim Harbaugh said that once Smith is available, the starting QB for the team could change week to week, and even during the course of a game.

Harbaugh gave no indication when he would select his No. 1 for Sunday's game against the Saints in New Orleans.