 CHICAGO--BUSINESS WIRE--Rush Street Interactive, Inc. NYSE: RSI RSI or the Company, a leading online casino and sports betting company in the United States, today announced that the Arizona Rattlers the Rattlers, a long-established professional indoor football franchise, designated RSI as their operating partner for online sports betting. In addition to receiving market access in Arizona, RSI will become a major sponsor of the six-time world champion Rattlers. The Arizona Departme 