At MASN, Angelos negotiated dozens of carriage agreements throughout the territory and oversaw carriage-related public affairs, government relations and supporting litigation at FCC and Appellate Court proceedings including the ongoing carriage dispute with Time Warner Cable. In addition to managing the day-to-day business operations of the network, he oversaw MASN's transition to HD along with other programming and production enhancements including on-site 15 minute pre and post-game shows live from Nationals Park and Oriole Park at Camden Yards. In 2010, Angelos was named as one of the top ten decision-makers on in-market MLB streaming by "Sports Business Journal".