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Bell had a lot of valuable yards last year.

All yards gained on special teams are done outside of the context of the series (down and distance) environment that defines most games. A kickoff return from to the 30 or to the 40 represents a difference of 10 yards, but those 10 yards are not as valuable as the difference between a gain of 5 yards and 15 yards on 3rd-and-10. The former are, quite literally, special teams yards. They don’t provide any value in gaining any additional first downs, or keeping a drive alive. This is why we don’t spend a lot of time thinking about all-purpose yardage leaders, or the difference between a kickoff returner who averages 28.0 yards per return or 24.0. Special teams yards, while obviously valuable, are — just as obviously — the least valuable yards possible.

On a 3rd-and-10, a 15-yard pass provides a significant amount of value by providing a first down. But let’s get a bit more precise: the first 10 of those yards were really valuable. The last 5? Well, those were special teams yards. The difference between gaining 10 yards and gaining 15 yards on 3rd-and-10 isn’t that significant: well, it’s about as significant as returning a kickoff for 30 yards or 35 yards. Those last 5 yards don’t help a team move the chains.

Last year, Isaiah Crowell rushed for 944 yards on 197 carries. [1]Note: The play-by-play source material I am using has very minor errors, which leads to some numbers being slightly off. Crowell actually had 952 yards on 198 carries. That’s an average of 4.79 yards per carry, but of his 944 yards, 370 of them came after he had already rushed for a first down. That’s a whopping 39% of his rushing yards that we could call “special teams yards” that didn’t help move the sticks.

Conversely, T.J. Yeldon rushed 129 times for 463, a 3.59 YPC average. That was not good, of course. And while “special teams yards” are not as valuable as yards gained to help move the chains, getting almost none of them also shows a lack of explosiveness. Yeldon had just 47 special teams yards last year, or 10% of his rushing yards, the fewest ratio in the league (minimum 100 carries).

The table below shows the special teams yards, average yards per carry after removing special teams yards, and percentage of special teams yards gained by each running back.

Running BackRushRush YdYd/CarSp Tm YdsNon-ST Yd/CarSp Tm Yd %
Isaiah Crowell1979444.793702.9139.2%
Mike Gillislee1015765.72153.5737.3%
Jay Ajayi26012704.884413.1934.7%
Jordan Howard25213135.214473.4434%
LeSean McCoy23412675.414273.5933.7%
Devonta Freeman22810824.753563.1832.9%
DeMarco Murray29212834.394142.9832.3%
Ezekiel Elliott32216315.075193.4531.8%
Mark Ingram20510455.13283.531.4%
Bilal Powell1317145.452233.7531.2%
Jeremy Hill2228393.782532.6430.2%
Tevin Coleman1175174.421553.0930%
Latavius Murray1957884.042352.8429.8%
Melvin Gordon2539923.922952.7529.7%
Jacquizz Rodgers1305604.311623.0628.9%
LeGarrette Blount29911613.883302.7828.4%
Thomas Rawls1093493.2992.2928.4%
Rob Kelley1687044.191923.0527.3%
Terrance West1937754.022112.9227.2%
David Johnson29312394.233343.0927%
Jonathan Stewart2188253.782222.7726.9%
Carlos Hyde2179884.552643.3426.7%
Chris Ivory1174403.761132.7925.7%
Lamar Miller268107342673.0124.9%
Christine Michael1485833.941452.9624.9%
Spencer Ware2149224.312273.2524.6%
Ryan Mathews1556604.261613.2224.4%
Matt Forte2188143.731952.8424%
Tim Hightower1335484.121283.1623.4%
Derrick Henry1104904.451133.4323.1%
LeVeon Bell26212664.832863.7422.6%
Alfred Blue1004204.2923.2821.9%
Jerick McKinnon1595393.391102.720.4%
Rashad Jennings1815933.281202.6120.2%
Paul Perkins1124564.07903.2719.7%
Matt Asiata1224023.3792.6519.7%
Devontae Booker1726103.551152.8818.9%
C.J. Anderson1104373.97743.316.9%
Frank Gore26310263.91703.2516.6%
Todd Gurley2788853.181202.7513.6%
Doug Martin1444212.92442.6210.5%
T.J. Yeldon1294633.59473.2210.2%
191.2807.44.22218.83.0827.1%

As always, please leave your thoughts in the comments.

References

References
1 Note: The play-by-play source material I am using has very minor errors, which leads to some numbers being slightly off. Crowell actually had 952 yards on 198 carries.
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