Rickie Fowler takes slim lead into final day of PGA Championship . Austrian Open winner holds one shot advantage over Louisville 's Bernd Wiesberger . Jason Day , Phil Mickelson and Phil Mickelson all in chasing pack .
Rory McIlroy takes slim lead into final day of PGA Championship . British Open winner holds one shot advantage over Austria 's Bernd Wiesberger . Rickie Fowler , Jason Day and Phil Mickelson all in chasing pack .