When it comes to finding the right sleepers in fantasy football, a lot more goes into the process than simply considering the player. Big factors include their matchup, injuries on the opposing team, injuries on their team and their upside.
Sometimes a quiet fantasy player can put up a big game if the matchup is favorable. Other times sleepers turn into studs in relief of an injured teammate. Aaron Jones, for example, performed excellently in the absence of Ty Montgomery and has seen the field more ever since.
Another important word is volume.