QB: D
Nothing special. Warner could save the group but if he doesn't you have 3 fantasy backups.
RB: A-
Great group. Two of the top fantasy backs in Gore and Portis. Chris Johnson is my sleeper and Forte makes for an excellent backup RB.
WR: C+
Hard to say here since Boldin may be on the move. Calvin is ready to be a stud though. Bowe is going to have a horrible season and I think that was easily your worst pick. The Chiefs can't pass protect and without anyone else to catch balls at WR, Bowe is getting double teamed every play this season. He'll be a fantasy nobody.
TE: A-
Two of the best. Both have injury issues, but that is why you have both I suppose.
K/DEF: No one cares
Overall: B, maybe B+
I like the team a lot but it doesn have it's holes. RBs are great but you can only start two. You need 4 WR/TEs and I see 4 starters (tossing out Bowe), two of which have injury issues and one who wants desperately to be traded. It's a team that can compete for sure, but some injuries could really send your team down the tubes. I'd trade Bowe right away while he still has value.