The Union Association was essentially a Western organization...Messrs. Lucas, Wainwright, and the Busch Anheiser Brewing Company, of St. Louis, are moving spirits in the Association...A gentleman residing in St. Louis, who is intimately acquainted with Mr. Henry V. Lucas, the president and organizer of the new anti-league St. Louis team, to-day assured me that Mr. Lucas is not shouldering the costly team that has been engaged for that city. Said this gentleman: "I have reason to think-I might almost say I know positively-that the new St. Louis enterprise is secretly backed by a big brewing company. I believe that same concern is backing the Chicago Union scheme, and, in fact, is the main support of all the Union Association clubs. Beer-selling is to be a feature of all the games, and the brewing companies probably expect to make enough money out of the sale of beer to pay the cost of supporting the ball clubs."
-The Cleveland Herald, December 17, 1883
I certainly don't consider this confirmation of Anheuser-Busch's involvement with Lucas, the UA and the Maroons but I'm having fun trying to run this down. At this point, I honestly don't believe that A-B was involved in the financing of the UA but I'm keeping an open mind. The most I'm willing to say at this point is that Adolphus Busch was probably interested in Lucas' baseball venture and the two may have talked about the brewery investing in one or more clubs.