For 49ers fans, the Alex Smith era has been an unmitigated disaster. Smith has been the NFL version of the cat who came back. He just won't stay away. He's like Mac's dog Poppins on Always Sunny In Philadelphia. No matter how many times you think he's dead, he improbably returns to life. He's a football zombie who can't be killed, but instead of stumbling around searching for delicious brains, Smith searches for the sweet, sweet stench of losing streaks and incompletions. Still, Smith hasn't been the team's only problem since he was drafted in 2005. Far from it.