New York Yankees general manager Brian Cashman might have had good reason to tell third baseman Alex Rodriguez to "shut the (expletive) up" Tuesday night.

According to Bob Klapisch of The Record (Woodland Park, N.J.), a Yankees source characterized Rodriguez's behavior the past few days as "bizarre."

News also surfaced that during a conference call with Cashman and team president Randy Levine on Wednesday, Rodriguez told the two, "I don't know when I'm coming back. It could be July, it could be August. It might not be this year."

Rodriguez tweeted Tuesday that Dr. Bryan Kelly, the surgeon who operated on Rodriguez's hip in January, had given him "the green light" to move ahead with his rehab and play in games again.

To add more fuel to the tweet, Rodriguez posted an Instagram photo of him and Kelly talking at the Yankees' training facility in Tampa, Fla.

The back story to Kelly's meeting with Rodriguez is not that the two planned to meet in Tampa, but that Kelly and Rodriguez met by coincidence. The surgeon was sent to check on other players, not Rodriguez. It was also reported that Kelly did not examine Rodriguez this week, which conflicts with the tweet Rodriguez posted Tuesday night.

Another factor: Kelly is not responsible for Rodriguez's rehab process. That is the job of Christopher Ahmad, the Yankees' team physician.

When Rodriguez tweeted he was ready to return, he announced the news without the Yankees' permission—which is against protocol in the organization. Now, the question becomes whether the tweet was true.