Rory McIlroy, helped by composed shot-making and a stunning eagle on his ninth hole of the day, soared one stroke clear in the weather-hit second round of the PGA Championship at Valhalla Golf Club.
The British Open champion, in pursuit of a third consecutive victory on the PGA Tour, fired a four-under-par 67 on a wet, ultra-long Valhalla layout where play was suspended for 45 minutes earlier in the day due to water-logged conditions.
McIlroy, the pre-tournament favourite heading into the year's final major, holed an uphill 30-foot putt from just off the green to eagle the par-five 18th and also recorded four birdies and two bogeys to post a nine-under total of 133.
Four-times winner Tiger Woods, however, ended a miserable week prematurely when he missed the cut at a major for only the fourth time as a professional, looking tournament rusty in both rounds as he carded successive 74s.
McIlroy ended his round one ahead of Australian Jason Day, who fired a best-of-the-day 65, and veteran American Jim Furyk (68). Americans Rickie Fowler (66) and Ryan Palmer (70), and Finland's Mikko Ilonen (68) were a further stroke back.
Five-times major winner Phil Mickelson (67) was next best on a high-quality leaderboard, level at six under with Austrian Bernd Wiesberger (68).
England's former world number one Lee Westwood (72), fourth-ranked Swede Henrik Stenson (71) and American Steve Stricker (68) were among a group of seven players knotted at five under.