Claim: Colin Kaepernick was quarterback backup to Alex Smith.
Evidence: Colin Rand Kaepernick -LRB- -LSB- ` kæpərnɪk -RSB- ; born November 3 , 1987 -RRB- is an American football quarterback who is currently a free agent.
Kaepernick began his professional career as a backup to Alex Smith , but became the 49ers ' starter in the middle of the 2012 season after Smith suffered a concussion.