Brilliant Phil Mickelson atop leaderboard heading into final round at PGA Championship

CNN  — 

He might be one of the older statesman at the PGA Championship, but Phil Mickelson is showing he’s no slouch.

The five-time major winner produced some stunning golf on Saturday at Kiawah Island’s Ocean Course before dropping some late shots to finish on seven-under and atop the leaderboard of the major with a one-shot lead.

But his competitors aren’t far behind. Two-time winner Brooks Koepka was slow and steady in his movement up to just a shot behind Mickelson.

Heading into the final day of the PGA Championship, it looks to be a nervy one with numerous big names in contention, with 2010 Open winner Louis Oosthuizen just a shot behind Koepka.

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Mickelson hits the ball on the 11th hole during the third round at the PGA Championship.

Hot start, sloppy finish

Playing in the final pairing of the day with South African Oosthuizen, Mickelson started like a house on fire.

His driving was accurate and his short game was deadly as ever; a fearful combination for any of his competitors.

In his opening 10 holes of his third round, Mickelson – adorned head to toe in black – collected five birdies, at one point, racing into a five-shot advantage.

However, as the round progresse