I think the one thing the article misses is that pro backs these days are rarely speed burners. I don't mean they are slow, but most of the really good ones are about as fast as Mason. The thing he has is what the good ones have: he's big, he runs through first hits, he knows how to create a hole, he can block, and he can catch. What the pros are looking for is durable guys who can do what Mason does. If they can get someone a touch faster, they'd be happy, but I expect Mason to be drafted and stick with whatever team gets him. And, yes, if we can keep the OL from the same injury spate we had last year, he'll get more notice.
Btw, though he probably won't be drafted, I expect Howard, who is pretty much the same as Mason, but runs a trifle harder, to be successful as a free agent. If these two were still the two-headed monster, I'd be even happier. But Griffin can fit for that.