Running Back Speed Scores. Football Outsiders metric that mixes size and speed, they say it correlates better than either alone to NFL success. Average running back who makes it to NFL scores around 100. Ezekial Elliot was 112.7.

http://www.footballoutsiders.com/sta...eed-score-2017


2017 Speed Scores
Code:
Player		School		Weight	40 Time	Speed Score
Len. Fournette	LSU		240	4.51	116.0
Joe Williams	Utah		210	4.41	111.0
T.J. Logan	North Carolina	196	4.37	107.5
Jeremy McNichol	Boise State	214	4.49	105.3
Marlon Mack	South Florida	213	4.5	103.9
Dalvin Cook	Florida State	210	4.49	103.3
De' Henderson	Coast Carolina	208	4.48	103.3
Brian Hill	Wyoming		219	4.54	103.1
Elijah McGuire	Louis.Lafayette	214	4.53	101.6
Chris McCaffrey	Stanford	202	4.48	100.3
James Conner	Pittsburgh	233	4.65	99.7
Samaje Perine	Oklahoma	233	4.65	99.7
Chris Carson	Oklahoma State	218	4.58	99.1
Alvin Kamara	Tennessee	214	4.56	99.0
Aaron Jones	Texas-El Paso	208	4.56	96.2
Wayne Gallman	Clemson		215	4.6	96.0
Jamaal Williams	BYU		212	4.59	95.5
Kareem Hunt	Toledo		216	4.62	94.8
Tarik Cohen	N Carolina A&T	179	4.42	93.8
Stan Williams	Kentucky	190	4.51	91.8
Corey Clement	Wisconsin	220	4.68	91.7
Dare Ogunbowale	Wisconsin	213	4.65	91.1
Rushel Shell	West Virginia	227	4.74	89.9
Donnel Pumphrey	San Diego State	176	4.48	87.4
Jahad Thomas	Temple		190	4.63	82.7
Devine Redding	Indiana		205	4.76	79.9