Fresh look to US PGA Championship leaderboard with Will Zalatoris on top at halfway stage

• American holds one-shot lead over Mito Pereira at Southern Hills
• Rory McIlroy hits 71 but still in picture five shots off leader

In the city that houses a new museum dedicated to Bob Dylan, the times they are a changin'. How else to explain a major leaderboard as has Will Zalatoris and Mito Pereira - without a main tour victory between them - at the summit? Zalatoris leads Pereira by one at the halfway point of this US PGA Championship.

A 64 from Pereira, the 27-year-old Chilean, was already in the books before Zalatoris putted out for a 65. Nine under par plays eight under par. Increasingly benign conditions were notable on Friday afternoon but these were still terrific performances. I actually got away with murder a few times," said Zalatoris.