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Sporting News Radio at http://sportingnewsradio.com/ offers the Sports Flash hourly updates and numerous podcasts of daily shows.
They have been said to give permission for operators in areas without SNR affiliates, or you can just run it until they tell you to stop 🙂
You might try Ron Barr’s http://www.sportsbyline1.com/ which also offers some sports features
And there are billions of independently produced sports-themed podcasts so go to http://sports.podcast.com/ or do a Google search and you might find a new friend!