The 49ers have signed Randy Moss to a one-year deal. Overall, I can't fault the move, as San Francisco was privy to being able to work Moss out -- so I have to take the Niners' word on it in terms of how he looked. The key for Moss is very simple: speed. If Moss still has high-end speed and can run past defensive backs, he will be very effective. If he can't, he is useless.