Image source, AP

More birdies for Els and Walker on five, that pair are cutting a swathe through the leaderboard, up to eight under now. Joost Luiten - that rare thing, a Dutch golfer - opens up with a birdie to get to -8, as does Lee Westwood.

Garcia leaves his birdie putt short at three, as Mickelson is pictured striding through the clubhouse, head to toe in black, like Lee Van Cleef in For a Few Dollars More. I think I saw spurs on the back of his spikes, but I might have been mistaken...

BBC Radio 5 live

A quick reminder that BBC Radio 5 Live is now on air until, hopefully, the tournament ends later on Sunday (early hours of Monday UK time). Listen in, while you continue to read along here.

Jay Townsend
former European Tour golfer & BBC Radio 5 live pundit

"We're talking a five-hour round here for a two-ball."

Last man out Rory McIlroy tees off at 16.19pm local time and the sun sets just after 20.40pm. There are also thunderstorms forecast. Ok, so, what's everyone doing on Monday?

Rob, Leicester: I see yet another amateur (Andrew 19.54) is laying claim to drive the ball over 280 yards. I do wish some would look at the PGA Tour stats before fantasising about their length off the tee. I'm a low single figure player and considered a long hitter, and my average drive is nearer 250 yards. 280 virtually puts Andrew in the top 100 on the Tour. Dream on!

Ernie is two under through four, seven under for the week. There looks like there's a 64 out there somewhere. Jimmy Walker picks up birds at three and four, he's seven under as well. England's Lee Westwood about to tee off at the first...

Bristol's Chris Wood holes a bunker escape at seven for birdie and -3, Olesen lets one go at 14, he's now -5. Here's Rory on the range, chucking a few wedges down there. White pants in these conditions, he's got to be crackers.

Northern Ireland's Graeme McDowell had a rickety finish today, bogeys at 16 and 17, but notched up a birdie on 18 for a 69 and -1 overall. Levy moves to -8 courtesy of a birdie at four, that's still five off the lead. Garcia opens up with two pars to remain -5, including a ballsy saver at two.

Rory McIlroy was the focus of many a TV camera during the rain delay and the leader was caught entering his pin on his mobile phone by one TV company. Hence, the Northern Irishman tweets:, external "Passcode changed... Now time to play some golf!" Lovely stuff.

Good early round from Offaly's Shane Lowry today, a four-under 67. Went off the rails on Friday and Saturday, but he's under par at the finish. Warren of Scotland out of the traps with a 15-foot birdie at the first, he moves to -6. Ernie Els, who finished third in this event in 1995 and 2007, picks up a shot at the par-three third to get to -6

Speaking of elderly fellas, here's Kenny Perry birdieing seven to get to five under. Frenchman Alexander Levy picks up birdies at one and three to get to seven under, lowest on the course. Scotland's Marc Warren and American Brooks Koepka are playing the first, after that it's Bill Haas and another Frenchman, Victor Dubuisson.

Image source, Getty Images

The ball used by Rory McIlroy on the final hole of his Open Championship win has sold for $52,000 (£31,000). Yes, you did read that correctly.

Englishman Lee Horner caught the ball at the end of McIlroy's round and it attracted 22 international bids at auction, reaching a sum which is the second-highest ever paid for a golf ball., external

"Maybe this is Rory's thing. If he wins the PGA on Sunday, some lucky fan might have another $50,000 (£33,301) ball," said the auction company's co-founder, Ryan Carey.

The most expensive ball sold at auction saw a collector pay $55,865 in April 2011 for a vintage Bobby Jones autographed ball.

Andrew from Newcastle: Not bad in terms of rain but I once played in a tournament near Redcar where it was so windy that the winning longest drive, playing into said wind, was just shy of 120yds!!! I normally hit the ball 280+off the tee but managed a paltry 105yds. Downwind was fun though.

Denmark's Olesen nails a birdie on 12, moves to five under for his round and six under for the week. Monty leaves his bogey putt short on 18 and walks off with a round of 75 for five over overall. Not bad for an elderly fella.

Here's Monty trudging down the 18th fairway, his first shot will be a 214 yard approach. Actually, looks like he's already lumped one up there, he's only got a putter in his mitts. Sunny, now, in Lousville, and muggy, too.

Righto, Ben Dirs in the chair as they prepare to reload at Valhalla after the rain-induced ceasefire. I'm sure everything that needs to be said has been said, so probably best to stick to the golf. There's the hooter, we're back under way...

And that is my stint as a live weather text commentator over - at least for about the same time as it takes for a thunderstorm to pass over Valhalla. Now Ben Dirs is stepping on to the tee to talk you through the golf....

You can have all the technology in the world but sometimes the old-fashioned methods work just as well. And this is perfectly illustrated by an army of officious-looking gentlemen stamping furiously on to several towels laid out on the first tee.

One man not fazed by the wet weather was Rory McIlroy. While his opponents today are scurrying around changing their flights home or envisioning lifting a first major title, the Northern Irishman is intent on another win.

"It all feels quite normal. I think it might not feel that way to some of the other guys on the leaderboard," said the world number one when he arrived at Valhalla.

Image source, AP

Jenni in Newtownards: There will be so much nervous energy buzzing about in the clubhouse at the minute as these players wait to go out onto this very wet course. The winner of this PGA Championship will be the golfer who can manage their emotions and nervousness in the best way. At the minute I'd back the experience of Phil Mickelson and the confidence of Rory McIlroy to deal with this situation in the best manner.