NEW YORK, Aug. 19, 2013 /PRNewswire/ -- Sirius XM Radio (NASDAQ: SIRI) and Major League Baseball announced today a six-year extension of their agreement, which will now make MLB game broadcasts available on both Sirius and XM satellite radios, starting today, August 19. (Logo: http://photos.prnewswire.com/prnh/20101014/NY82093LOGO ) (Logo: http://photos.prnewswire.com/prnh/20130819/NY65717LOGO ) SiriusXM, which has been the Official Satellite Radio Partner of MLB since 2005, will continue to air live play-by-play of every regular and postseason MLB game, as well as select spring training and Spanish-language game broadcasts, through the 2021 season. All MLB games will be available for the first time to subscribers with Sirius radios on either a Premier or All Access package. All MLB games will continue to air on all XM radios. "Baseball has been an essential part of our programming lineup and we're very happy to extend our relationship with MLB to deliver the games to our subscribers for many years to come," said Scott Greenstein, SiriusXM's President and Chief Content Officer. "We're especially pleased to now offer the games to SiriusXM subscribers whether they listen through Sirius radios, XM radios, the SiriusXM App or online." "SiriusXM has been a valuable partner providing our fans with the ability to listen to every MLB game on the growing platform of satellite radio," said Tim Brosnan, MLB Executive Vice President, Business. "We are proud that Major League Baseball content has been an important contributor to the growth of satellite radio and we look forward to continuing this relationship into the next decade." Live MLB game broadcasts are also currently available to all subscribers on the SiriusXM Internet Radio App and online at SiriusXM.com through SiriusXM's agreement with MLB Advanced Media, L.P., the interactive media and Internet company of Major League Baseball. In addition to MLB game broadcasts, SiriusXM will continue to offer baseball fans 24 hour coverage of their sport on the MLB Network Radio channel, available on channel 89 for XM subscribers and channel 209 for Sirius Premier subscribers. MLB Network Radio airs 365 days a year with daily shows hosted by former GMs, players and other baseball insiders, in-depth coverage of spring training, the winter meetings and other events, as well as simulcasts of certain MLB Network television programming, including the Emmy Award-winning studio show "MLB Tonight."