Justin Thomas' caddie, Jim 'Bones' Mackay is set to earn himself a little piece of history this week when he fulfils lead-analyst duties during NBC Sports' coverage of the Mexico Open on the PGA Tour.
With Thomas opting to have the week off after a disappointing Genesis Invitational and having competed in four of the past five events, the veteran tour looper is taking the opportunity to become the first active caddie ever to serve as the main color-commentator for the broadcaster.
