Who are the "contacts" that baseball beat writers break point to new rumors?

I have a great Seattle Mariners blog and want to improve our positions with real reports. Does anyone know where sports reporters get their information?

Authors Anonymous sources baseball reference, when the news and rumors are usually people who work or are associated with the team, but technically are not allowed to speak with the media or provide certain information, either because they are too low on the totem or because they are capable of giving too much inside information. Sometimes are people of a journalist has developed a relationship with either the flag or to deal with more companies, but not always.

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