Flex Help: R. Brown, D. Jackson, M. Wallace, Driver?

[statesoccer9]

Need a little help choosing which is gonna have a better day on friday. R. Brown, D. Jackson, M. Wallace, Driver?

I am currently starting

QB- Peyton
RB- Steven Jackson
RB- Ryan Torain
Flex-......?
WR: Wes Welker
WR: Brandon Llyod
TE: Dallas Clark
D/ST: Packers
K: Crosby