For the past month, NFL fans have relentlessly searched for undervalued players. Players who were primed for breakout seasons, or players who would rebound from mediocre past performances.
Until today, those fans were simply guessing.
But after the conclusion of the first set of NFL games, the true sleepers are separating themselves from the pretenders. Fans and fantasy owners alike have a better understanding of which players they can trust, and which players rode preseason hype into undeserved praise.
Arian Foster's breakout performance was an obvious example of a former sleeper who proved his worth in Week 1. But he was not the only sleeper who performed up to expectations.
And Kevin Kolb's atrocious game was not the only example of a high-profile sleeper that proved to be a disappointment.
Let's take a look at some of the fantasy sleepers, and how they performed in Week 1.