ATLANTA — Aldon Smith looked at the autograph scratched atop his white headphones and sighed.

“I don’t really like it,” Smith said as he made his way down a corridor inside the Georgia Dome, still holding the black Sharpie that had been used to permanently decorate his Beats. “It’s not legible. It’s not good. It’s not good at all.”

Colin Kaepernick has a messy autograph. The horror. His play? His play Sunday against Atlanta was just another piece of evidence showing why Jim Harbaugh made the outside-the-box decision to replace Alex Smith with Kaepernick midway through the season.