Chasing success in the NFL requires an intense amount of focus. What starts with the daily grind of training camp in the summer doesn't get completely rewarded until someone hoists the Lombardi Trophy the following February.
There are plenty of things that can cause distractions in a locker room and on the field, though. From messy contract situations to trade demands, there are lots of things that can take attention away from the business of winning games on the field.
While this is generally a time for optimism, it's also not too hard to envision some of the situations across the league that could become distractions.