That list is actually missing one. If craft breweries are those producing under 6,000,000 barrels a year, then Yeungling would be the nation's largest craft brewery, as they passed Sam Adams in production numbers last year for the first time, at just under 2,500,000 barrels.
Of course, the writer of the article, like everyone else, probably wouldn't consider Yuengling a craft brewery any more than I would, but then she should have used a different definition of the term in her article if she was going to omit them.
I think they need to redefine "craft brewery" as under 500,000 barrels, as the guys in the top 4 in that article are gigantic international brands that produce ALOT of beer.