Having recently signed a promotional deal with Germany based Sauerland Promotions, it is understood the company was unhappy with Booth occupying both the trainer and manager's role, which caused him to quit both, according to the reports.
The news caps off what has been an annus horribilis for 30-year old Liverpudlian Price.
Following back-to-back stoppage defeats to Tony Thompson, Price turned to London-based Booth, who trains former WBA heavyweight champion David Haye and middleweight Andy Lee, for help in resurrecting his career.
Soon after signing with Sauerland, Price relinquished his British and Commonwealth belts, ruling out a fight with mandatory challenger Dereck Chisora.
Just weeks ago, Booth was happily showing journalists footage of things he and Price had been working on in training, and the former champion was due to make his comeback in Germany on December 14 against 6ft 9” Russian Evgeny Orlov, before pulling out with a virus.
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