Just did a fantasy draft and got Singletary, Diggs, and Josh Allen all well below their ADP. I'm expecting Singletary to be a good RB2 this year. I have Kamara as my RB1.
Also picked up Leveon Bell way below his ADP, but that's more of a risky pick.
Yeah, Allen takes a lot of goal line touches from the running backs, and Moss should get some too, but Singletary will likely be used more in the passing game and will be valuable in PPR leagues, I'd bet.