In 2013, as Tom Brady and Alex Guerrero prepared to launch their TB12 therapy center, Bill Belichick made clear during a sports medicine symposium that he trusted the medical and training staff the Patriots already had in place. He credited the team's staff with helping to win the franchise's first three Super Bowls.
In the years after, Belichick allowed many of Brady's teammates to participate in training regimens not with the Patriots' highly regarded medical and training staff, but at the TB12 Center just outside of the stadium in Patriot Place. Guerrero treated the players there with his alternative methods, and the TB12 Center billed the Patriots for his services.
Belichick also permitted Guerrero, Brady's close friend and business partner, to secure his own office near the Patriots locker room, fly on the team charter to road games, and receive credentials to work the sidelines of every game, home and away.
https://www.bostonglobe.com/sports/patriots/2017/12/19/bill-belichick-curbs-privileges-tom-brady-associate-alex-guerrero/NgoTiMHsA7UfWyG3jtquVI/story.html
But this season the Patriots coach has reversed course. For reasons he has declined to explain, Belichick weeks ago stripped Guerrero of his special team privileges, restoring a measure of tradition to the team's medical and training operation, according to several people familiar with the Patriots' internal operations.
Guerrero is now banned from boarding Patriots jets. His sideline access has been revoked. And he no longer is permitted to treat players other than Brady in his exclusive office at Gillette Stadium.
Tom Brady's Personal Guru Is a Glorified Snake-Oil Salesman
According to the FTC, Alex Guerrero faked being a doctor and claimed his products could cure cancer and concussions. These days, Guerrero's business partner is the greatest quarterback of all time.
He said his name was Dr. Alejandro Guerrero, and he had incredible news.
At his California clinic, Dr. Guerrero had been testing a nutritional supplement that—he claimed, according to affidavits filed in federal court—produced miraculous results. He said he'd conducted "clinical studies" of 200 patients who'd been diagnosed as terminally ill. They were suffering from ailments such as cancer, AIDS, multiple sclerosis, and Parkinson's disease. And eight years later, all but eight had survived and he had incredible news.
http://www.bostonmagazine.com/news/2015/10/09/tom-brady-alex-guerrero-neurosafe/
https://www.bostonsportsjournal.com/2017/12/20/much-concern-alex-guerrerobill-belichick-rift-patriots/
-Over the last few years, Guerrero's influence has grown inside the Patriots' locker room, as he now treats about 20 Patriots players.As that influence increased, Guerrero became more emboldened in the advice he dispensed, and more adamant that when his instructions conflicted with that of the Patriots' strength, training and medical staffs, the players were to follow his directives.
-This greatly agitated the Patriots' staff.One example: a Patriots starter was told by Guerrero not to do squats. When the strength staff made that part of the player's normal in-season workout, the player refused to do the exercise. That only added to the tension between the Patriots and Guerrero.In the early stages of the season,
-Belichick professionally informed Guerrero that the team wanted to keep everyone on the same page for the betterment of the franchise. Guerrero told a different account to many of his clients — one that painted Belichick in a poor light — which further damaged the relationship, perhaps to the point that it can't be repaired. With Brady as his top client, and with a business relationship with the Kraft family, Guerrero was largely allowed to do what he wanted.
-Consequently, Belichick was helpless when it came to dealing with Guerrero. It became more of an issue when his clientele went from a handful of Patriots players to nearly half of the roster.Guerrero is still allowed to treat Brady in the Patriots' facility in a private room, but his appearance in other parts of the building is an intentional irritant to Belichick.
-Guerrero has traveled to the team's locations to treat Brady on the quarterback's dime.The situation has absolutely become a source of friction between Brady and Belichick. But unless Brady forces the issue and demands Guerrero's reinstatement, no one believes it will affect the team on the field.But that hasn't stopped some behind the scenes at Gillette from referring to Guerrero as "Yoko Guerrero," in reference to Yoko Ono, the wife of John Lennon who some believe caused the breakup of The Beatles.
-There was an attempt to bring the three parties — Belichick, Brady and Robert Kraft — together to put the issue to bed prior to the game in Miami, but it didn't happen. It's not known whether another attempt will be made.Two sources said they believe the current arrangement is permanent.
-Belichick doesn't want to irritate his staff further by giving in on Guerrero. Brady is steadfast in his belief in and support of Guerrero. Kraft is basically trying to remain Switzerland between his Hall of Fame coach, and the franchise player he adores.
