Many matchups come down to the last offensive player that you decide to play, otherwise known as the flex option. Players such as Darren Sproles, Victor Cruz or Nate Washington have probably had their say in winning teams this season.
Many of the championship teams in fantasy football in the past have probably won due to a couple of key pickups throughout the season. It's always important to scour the waiver wire and and try to steal away the best pickups from your opponents.
With these ideas in mind it's a good idea to look at some good flex options in Week 4. Here are 15 of the top options.