blog post today reports that they're closing up shop; according to STL Hops' note about the closure, they've chosen not to renew their liquor license. Whether they'll reopen at some point or sell the place is unknown. These guys were one of our favorite stops in St Louis, as they offered some interesting and high-quality brews.
You can get two of their beers at the Schlafly taproom - a wheat on tap and an old ale in bottles. I suspect this isn't the last we've seen of their brewer, Drew Huerter, as he's clearly a skilled brewer and should find no lack of interest in his abilities.
Goodbye, Mattingly, and cheers to new opportunities.
NOTE - Thanks to responders for clarifying that Huerter currently works at Schlafly Bottleworks full time.