Xander Schauffele holds slender lead at Valhalla as Rory McIlroy's challenge stagnates

Xander Schauffele clings onto a one-stroke lead at the midway point of the US PGA Championship as Rory McIlroy's major tilt regressed at the second round at a soggy and mud-laden Valhalla GC.

Schauffele added a second round of 68 to his record-equalling opening 62 to reach 12 under, matching the championship scoring record in relation to par set by Brooks Koepka in 2019.

Former champion Collin Morikawa was a shot off the lead following a superb 65, with Sahith Theegala another stroke back and Scottie Scheffler and Bryson DeChambeau part of a four-strong group on nine under.

Scheffler amazingly returned a 66 hours after being arrested – and subsequently released from police custody – following an incident outside the course.

Scheffler had attempted to get into the course amid heavy traffic caused by an earlier unrelated accident in which a male pedestrian died after being struck by a shuttle bus.

The world number one faces charges of second-degree assault of a police officer, third-degree criminal mischief, reckless driving and disregarding traffic signals from an officer directing traffic.

The fatal accident resulted in a delay of 80 minutes to all tee times and meant 18 players were unable to complete round two before darkness fell.

Morikawa and Scheffler made up the last group in the final round at Augusta National in April, with Scheffler cruising to his second green jacket as Morikawa faded to a tie for third after a 74.

As it happened: PGA Championship Day 2

However, it was a frustrating round for Rory McIlroy, whose challenge stagnated on Friday with a disappointing even par round 71.

McIlroy, who won the most recent of his four major championships at this layout 10 years ago, made the perfect start with a long birdie putt