https://www.pff.com/news/pro-signature-stat-spotlight-running-backs
PFF Elusive Rating, which pulls carries, receptions, forced missed tackles and yards after contact into a formula to calculate a rating similar to passer rating, is meant to illustrate a running back’s elusiveness in a singular number. The formula: (Forced Missed Tackles) / (Carries + Receptions) * (Yards After Contact per Attempt * 100).
Among the 51 NFL running backs with at least 100 total touches (rush attempts + receptions),
Dallas Cowboys rookie running back
Tony Pollard ranked first in PFF Elusive Rating at 116.1. He forced 26 missed tackles and averaged 4.51 yards after contact per rush attempt across his 101 touches in 2019.