Waiver wire help needed WHIR

[shortbus]

This is my first year of fantasy football, and I thought I had a decent team prior to week 1. I need some advice and here is what I'm starting with:

My team currently consists of:
QB Roethlisberger
WR Andre Johnson
WR Miles Austin
WR Brandon Marshall
RB Mendenhall
RB Shonn Greene
TE Gronkowski
K Rob Birones
D San Diego

Bench: Josh Freeman, Knowshon Moreno, Percy Harvin, Tony Gonzalez, Devery Henderson, Dallas Defense.

As you can see I got DESTROYED at running back this week, and Roethlisberger didn't help much either. I have Waiver #1 in a 10 team league and I am thinking about doing this:

1: Picking up Cam Newton and dropping San Diego
2: Picking up Akers and dropping Birones
3: Picking up Pierre Thomas or Cadillac and dropping Knowshon Moreno.

If I pick up Newton I might try to trade Freeman or Roethlisberger for a WR or RB. I don't think I need two TE's, but I feel that Tony Gonzalez is a good backup for Gronkowski. Ultimately I know that Mendenhall will do better, but Greene and Moreno are expendable to me now.

Available Players:
RB: Pierre Thomas, Carnell Williams, Ben Tate, Darren Sproles, Derrick Ward, Marcel Reece, CJ Spiller, Danny Woodhead
QB: Henne, Newton, Sanchez, Hasselbeck, Grossman, McCoy
WR: Early Doucet, Randall Cobb, Doug Baldwin, Robert Meachum, Davone Bess
K: Akers, Gould, Scobee, Lindell, Folk, Nugent, Kasay

I've tried to be thorough, and I appreciate any and all advice you all can give. Let me know what you'd do in my situation. Thank you!

[dude,micah]

Ok so welcome to fantasy football haha the most unpredictable game ever! ok so your right about dropping SD because a team should never harbor 2 D's, also Newton is a decent look but you can never trust a rookie early in season lets see what he does against a D like GB, I would personally look to package a rothlisberger and someone els deal to grab matt stafford maybe get rid of Harvin and grab doucet, your right about not needing 2 TEs I like hernandez enough to drop gonzo but thats up to you, I would definitely grab akers im suprised hes still avaliable,hold on to moreno he will improve, id grab williams and drop gonzo

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