FJax is probably more of a flex back now than an RB2.
Give it a week or two before saying that...
Spiller is always hurting/fumbling..
Jax is still coming off an injury. Don't judge him too harshly this weekend, he's playing SF in gay town.
Now, in two weeks if the story is the same, then yes, he's a flex back..
Also, keep in mind that the Bills have a lot of injuries at WR, and are using FJax as a wide out as well. They did it several times last weekend. This also increases the value of Scott Chandler. (woo hoo)