Since I didn't know much about the RBs mentioned in the article I did some research.
Benny Snell Jr.: 5'10", 224 lbs, 23 years old, career average 3.6 yards per carry, 6.5 yards per catch, plays special teams, entering his 3rd season.
James Robinson: 5'9", 219 lbs, turns 23 in August, career average 4.5 yards per carry, 7.0 yards per catch, doesn't appear to play special teams, entering his 2nd season, gained 1,070 yards as a rookie.
Sony Michel: 5'11", 215 lbs, 26 years old , career average 4.3 yards per carry, 9.9 yards per catch, plays special teams, entering his 4th season, gained over 900 yards in each of his first 2 years with NE.
David Johnson: 6'1", 224 lbs, turns 30 in December, career average 4.1 yards per carry, 10.5 yards per catch, plays special teams, entering his 7th season, gained 1,239 yards in 2016.
AlbaNY_Ram