Trade Help

[CousinOfDeath]

This guy in my 10 team non-ppr league only drafted 3 RB's, and one of them was Ryan Grant. His roster is as follows:

Joe Flacco | Ben Roethlisberger
Adrian Peterson | Jonathan Stewart | (Ryan Grant)
Miles Austin | Steve Smith (Car) | Pierre Garcon | Jacoby Jones | Jeremy Maclin
Brent Celek | Owen Daniels
Gostkowski
49ers | Panthers

My roster is

Tony Romo | Chad Henne
Chris Johnson | Jahvid Best | Ahmad Bradshaw | Cadillac Williams | Laurence Maroney
Brandon Marshall | Desean Jackson | Donald Driver | Mohamed Massaquoi
Tony Gonzalez | John Carlson
Akers
Giants

Do you guys see any possible way that I can prey off of his depleted RB depth?