Perkins is the first choice to be the Giants' lead back, but he's being drafted along with some committee backs.
By the seventh round of fantasy football drafts, you start throwing darts.
It's just the way it works. Even if there are a lot of reasons to like a certain player who has lasted until the seventh round, there are still reasons why he's lingering. And even if you think you have a seventh-round pick's upcoming season mapped out to the yard, you're likely going to be wrong.
For running backs, the uncertainty generally stems from a lack of guaranteed work.