Powell has bested Joe McKnight for the third-down role, Manish Mehta of the New York Daily News reported Wednesday.
Powell beat out McKnight with a productive preseason (26 carries for 92 yards), and he's seen as a better pass protector for Mark Sanchez, who was sacked 39 times last season.
This isn't the end for McKnight, who's nursing a hamstring injury. He'll still earn carries and find his way into a variety of plays, but Powell is Greene's primary backup to start the season.
Of course, the third-down back's role in New York could look different than on other teams around the league. We're still waiting to see what Tebow's magical Wildcat subpackage brings to town.