The fantasy playoffs are officially upon us, and chances are we will talk about some of the superstars who propelled your teams to the knockout rounds. Week 13 of the NFL season was full of outstanding performances from each position group, with familiar faces occupying many of the top spots.

Each week, we'll take a look at offensive players at each position who helped put their team in the best position to win. However, we'll be going beyond just the box score by diving into the impact of each player on their team's success.

To do this, we'll utilize our signature metric, Net Expected Points (NEP), which quantifies the number of points a player adds to his team versus how he's expected to perform. When a player rushes for 5 yards on a 3rd-and-3 and keeps the drive -- and potential for scoring points -- alive, he'll add more to his team's expected point total than when a player rushes for 5 yards on a 3rd-and-9 and forces his team to punt.

So, who were Week 13's NEP superstars?