Seemingly every year in NFL history, some player will emerge out of nowhere to lead his real team (and his fantasy team) to the playoffs, only to slip back into obscurity for the rest of his career. These one-year wonders can happen for a number of reasons, some of them circumstantial, some due to injuries, proper schemes, coaching decisions and some due to being chemically enhanced.
Whatever the reason, we have been trained over the years to look for these outliers, or one-year blips, where the performance just doesn't seem to match up with the rest of the portfolio of work. Sometimes you want to give the younger players the benefit of the doubt, as wide receivers typically don't start taking off until their third year in the league.
For example, it is safe to say that DeMarco Murray will not be able to keep up the pace he established with his first NFL start last week. That was a one-game wonder. We are talking here about one-year wonders.