RB committee: Who's the top back?

The fantasy backfield committee update will help you understand what’s happening in the world of running back tandems.
The four "worry levels" – High, Medium, Low, and Non-Existent – are subject to change on a weekly basis.
And now, without further ado, is our look at the backfield status for each of nfl jersey
the NFL’s 32 teams.
Arizona Cardinals
Committee worries level: Medium
Week 2: Tim Hightower (11 carries, 115 yards, TD; two receptions, nine yards); Chris "Beanie" Wells (DNP - injury)
Season: Hightower (24 carries, 169 yards, 2 TD; six receptions, 49 yards); Wells (no stats)
Comment: Wells thinks he’s going to play this week after missing the first two games with a bruised knee. His coach isn’t so sure. Hightower’s running stats from Week 2 look great, but remember that there was an 80-yard TD in there, and they don’t happen a lot.
Atlanta Falcons
Committee worries level: Low
Week 2: Jason Smelling (24 carries, 129 yards, 2 TD; five receptions, 57 yards, TD); Michael Turner (nine carries, 75 yards)
Season: Smelling (26 carries, 133 yards, 2 TD; six San Francisco 49ers jersey
receptions, 61 yards, TD); Turner (28 carries, 117 yards; one reception, seven yards)
Comment: Turner injured his groin last week, but he was cleared to come back into the game before his coaches decided to keep him out of the blowout win over the Cardinals. Smelling looked like Superman in relief of Turner, but he’s headed back to a second-fiddle role.
Baltimore Ravens
Committee worries level: Medium
Week 2: Ray Rice (16 carries, 87 yards; four receptions, 30 yards); Willis McGhee (three carries, 10 yards)
Season: Rice (37 carries, 130 yards; six receptions, 49 yards); McGhee (nine carries, eight yards, TD; one reception, minus-six yards)
Comment: Coach Jim Herbage says Rice will get more work this week against the Browns. Woo-hood!
Buffalo Bills
Committee worries level: High
Week 2: Marsh awn Lynch (17 carries, 64 yards); Fred Jackson (nine carries, 39 yards, TD); C.J. Spiller (one carry, three yards; four receptions, 23 yards)
Season: Lynch (20 carries, 77 yards); Spiller (eight carries, nine yards; eight receptions, 31 yards); Jackson (13 carries, 58 yards, TD; two receptions, zero yards)
Comment: Lunch’s busy game against the Packers threw a big Buffalo Bills jersey
wrench into this situation, didn’t it? Head coach Chan Gaily also talked earlier this week about using Spiller more in the coming weeks, and Jackson had more than 1,400 yards from scrimmage last season, so we can’t forget about him. What a mess – bench all of ‘me until further notice.