Those looking for handcuff backs can consider Darren McFadden in Dallas, as he's expected to be the No. 2 behind Ezekiel Elliott. Last year's No. 2 for much of the season, Alfred Morris, has reportedly been shopped. He's no lock to make the 53-man roster, which isn't surprising when you look at the numbers.

While Elliott, running behind Dallas' elite offensive line, was one of the league's most effective ballcarriers a year ago, Morris, running behind that same line, was one of its least effective. That's what the production of each team's various No. 1 and No. 2 running back shows.

In the tables, backs are sorted by yards per carry. That's not the end-all and be-all, but it makes for an interesting comparison when looking at ballcarriers on the same team running behind the same line. Buffalo, for example, had a pair of effective runners. Minnesota had a pair of ineffective runners. And then there are teams like Dallas that had a very effective No. 1 -- and a really ineffective No. 2.

NO. 1 RUNNING BACKS, 2016
No. 1AttYdsAvgTD
Ty Montgomery, G.B.774575.93
LeSean McCoy, Buff.23412675.413
Jordan Howard, Chi.25213135.26
Ezekiel Elliott, Dall.32216315.115
Mark Ingram, N.O.20510435.16
Jay Ajayi, Mia.26112724.98
LeVeon Bell, Pitt.26112684.97
Devonta Freeman, Atl.22710794.811
Isaiah Crowell, Clev.1989524.87
Carlos Hyde, S.F.2179884.66
DeMarco Murray, Tenn.29312874.49
Spencer Ware, K.C.2149214.33
Ryan Mathews, Phil.1556614.38
Jacquizz Rodgers, T.B.1295604.32
David Johnson, Ariz.29312394.216
Robert Kelley, Wash.1687044.26
Christine Michael, Sea.1174694.06
Lamar Miller, Hou.26810734.05
Latavius Murray, Oak.1957884.012
Terrance West, Balt.1937744.05
LeGarrette Blount, N.E.29911613.918
Frank Gore, Ind.26310253.94
Melvin Gordon, S.D.2549973.910
Theo Riddick, Det.923573.91
Jeremy Hill, Cin.2228393.89
Jonathan Stewart, Car.2188243.89
Matt Forte, NYJ2188133.77
T.J. Yeldon, Jac.1304653.61
Devontae Booker, Den.1746123.54
Jerick McKinnon, Minn.1595393.42
Rashad Jennings, NYG1815933.33
Todd Gurley, L.A.2788853.26
NO. 2 RUNNING BACKS, 2016
No. 2AttYdsAvgTD
Kerwynn Williams, Ariz.181578.72
Jalen Richard, Oak.834915.91
Mike Gillislee, Buff.1015775.78
Bilal Powell, NYJ1317225.53
Kenyan Drake, Mia.331795.42
Eddie Lacy, G.B.713605.10
Duke Johnson, Clev.733584.91
Benny Cunningham, L.A.211014.80
Darren Sproles, Phil.944384.72
Matt Jones, Wash.994604.63
Rex Burkhead, Cin.743444.62
Fozzy Whittaker, Car.572654.60
Derrick Henry, Tenn.1104904.55
Tevin Coleman, Atl.1185204.48
Dion Lewis, N.E.642834.40
Kenneth Dixon, Balt.883824.32
Alfred Blue, Hou.1004204.21
Tim Hightower, N.O.1335484.14
Paul Perkins, NYG1124564.10
C.J. Anderson, Den.1104374.04
Chris Ivory, Jac.1174393.83
Zach Zenner, Det.883343.84
DeAngelo Williams, Pitt.983433.54
Alfred Morris, Dall.692433.52
Robert Turbin, Ind.471643.57
Matt Asiata, Minn.1214023.36
Charcandrick West, K.C.882933.31
Thomas Rawls, Sea.1093493.23
Jeremy Langford, Chi.622003.24
Kenneth Farrow, S.D.601923.20
Doug Martin, T.B.1444212.93
Shaun Draughn, S.F.741962.64

Another pair that leaps out is in Chicago. Jeremy Langford was the starter entering the season a year ago, but Jordan Howard quickly overtook him, and was far more effective. Only two No. 1 tailbacks had a higher yards per carry average than Howard, while only three No. 2s had a lower one than Langford. If you're hanging onto Langford in a dynasty league somewhere, time to cut the cord.

--Andy Richardson