I wasn’t saying he shirked. He clearly doesn’t have the body strength to be good at it.
As you say he passed it off because others were better, but it’s a lot better to have a fullback who can run it back without having to worry about passing it off to get the best meters or to avoid injury.
FWIW though he wasn’t 3rd
This year he was 6th in runs
Last year he was 5th
Most teams fullbacks are in the top 3.
He was 3rd in average runs per game which is the stat I mentioned. Total runs for the season is going to be skewed because of the different amount of games everyone played.