He can catch the football, too. He's a 3 down RB in their opinion. Size/speed combo is unique to the roster. Big plans for Mason in this offense per Alec Lewis at The Athletic.
I think when the 49ers came to town last year and Mason put up 100 yards against a very good run defense, the Vikings made a mental note. A fantasy guy predicted the other day that Mason would lead all NFL RBs in TDs this year. I wouldn't go that far, but I think we likely double the abysmal number of RB rushing TDs we had last year.