This changed after 1980, as fans of the Philadelphia Phillies were angry that they could not hear their popular broadcasting team of Harry Kalas and Richie Ashburn call the team's run to the title. Since then, only the flagship stations of the two participating ballclubs can originate coverage, though their broadcasts, as well as the national English and Spanish broadcasts, are also available on Sirius XM. Flagship stations are required to make mention of the presenting sponsor of the national ESPN Radio broadcasts as also sponsoring the team's own broadcasts during the World Series (as of 2016 this is AutoZone). All other network affiliates of the two clubs must carry the feed from MLB's national partner (currently ESPN Radio). If another ESPN Radio affiliate exists in the same market, that station can claim exclusivity, forcing a blackout of the team network affiliate from carrying the game, though this is rarely done as listener pushback against the ESPN Radio affiliate blocking the local play-by-play would likely be untenable (for instance in 2016, ESPN Radio O&amp;O WMVP in Chicago broadcast the national ESPN feed as expected, but made no move to block the official Cubs broadcaster WSCR from carrying local play-by-play, to the point of only mentioning the national coverage existed on their station through promos in national ESPN Radio programming).