I think McCarthy is kind of like Parcells, biased against little guys. I think we saw that with Deuce and Dowdle. So I doubt we even sign a smaller guy, and I kind of doubt we draft a guy like Irving unless he just really falls a mile.
I don't really know. His history with RBs with the Packers wasn't great. He had Aaron Jones who was a leading rusher with him. But he didn't become a 1000 yard rusher until after McCarthy left.
Other leading rushers:
Aaron Jones (2018)
Jamaal Williams (Only 556 yards, split carries with Aaron Jones 2017 season)
Ty Montgomery (Literally a WR who they played at RB 2016)
Eddie Lacy (Fatass draft bust 2015)
Eddie Lacy (Good year 2014)
Eddie Lacy (Prior to becoming fatass 2013)
Alex Green (Broken down shit season by then 2012)
James Starks/Ryan Grant (Pretty balanced split of carries 2011)
Brandon Jackson 2010
Anyway, I wouldn't say he has always had big backs but he also has basically never had a workhorse outside of the Eddie Lacy years. Who was actually better than I remember for the first two years. But then he got really fat for the next two and was awful.