Via Yahoo.com: 

“At the time, there was an incredible amount of buzz around the NFL that the 49ers originally asked for Garoppolo, but Belichick instead offered Brady. A Patriots source confirms that’s how it went down, and a 49ers source close to John Lynch says the first-time general manager couldn’t believe his ears when he heard the counteroffer.

”Kraft shut that s—t down fast,” says a source close to Belichick. “So, instead, Lynch gets Garoppolo, but Brady, Belichick, and Kraft haven’t been the same since Tom learned that Bill was ready to get rid of him. And that lit a fire under his ass.”

Miller adds that a former teammate of Brady said that was the deciding factor for him to leave once he had the opportunity.

Bombshell dropped.

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