<P> Capable of reaching 21 million listeners in nine states including Missouri, Illinois, Arkansas, Indiana, Iowa, Kentucky, Mississippi, Oklahoma, and Tennessee, the Cardinals radio network is the second - largest in MLB with 117 affiliate stations . In St. Louis, CBS - owned KMOX (1120 AM) airs Cardinals games over radio and feeds the rest of the Cardinals network . Mike Shannon and John Rooney alternate as play - by - play announcers, with Chris Hrabe serving as pre-game and post-game host . KMOX's 50,000 - watt clear - channel signal covers much of the continental United States at night . At one time, owing to the Cardinals' status as a "regional" franchise, the Cardinals radio network reached almost half of the country . </P> <P> The 2011 season marked the Cardinals' return to KMOX following five seasons on KTRS (550 AM), a station which is 50 percent owned by the Cardinals . With a partnership spanning seven decades, and continuously since 1954, its conclusion realized after the 2005 season when CBS Radio and the Cardinals failed to reach terms on a new rights agreement . However, frustrated by the underpowered coverage of 5,000 - watt KTRS, the Cardinals reached a new deal with KMOX in 2011 . </P> <P> Mike Shannon will announce 30 fewer games in 2013, compared to the 15 he took off in 2012, and in previous seasons . Most of the games will be road games and three - city trips . He has been announcing Cardinals' games starting in 1972, making 2013 his 41st year announcing . He turns 74 in July . He has announced Cardinals' games for more years than anyone except Jack Buck (1954--58, 1961--2001) who announced for 46 years . </P> <P> Since 2000, Cardinals telecasts have generated the top three in ratings in MLB every season . Fox Sports Midwest airs all games in high - definition and is the team's exclusive television broadcaster, with the exception of selected Saturday afternoon games on Fox (via its St. Louis affiliate, KTVI) or Sunday Night Baseball on ESPN . Fox Sports Indiana, Fox Sports South, Fox Sports Tennessee, Fox Sports Oklahoma, Fox Sports Southwest, and SportSouth air Cardinals games for fans living within the Cardinals broadcast territory who do not receive the Fox Sports Midwest channel . During the 2016 season, the Cardinals averaged a 8.54 rating and 104,000 viewers on primetime TV broadcasts in St Louis . </P>

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