US Open Golf 2017 Leaderboard: Live Updates and Storylines to Watch for Saturday

It has been an eventful U.S. Open so far at Erin Hills in Erin, Wisconsin, and while there are four players sharing the lead at the start of play on Saturday—Paul Casey, Brian Harman, Brooks Koepka and Tommy Fleetwood—there are plenty of storylines worth watching further back.

The leaders head into moving day on seven-under. Starting one shot behind them are Rickie Fowler, J.B. Holmes and Jamie Lovemark.

It could all change on Saturday, though. Here's the live leaderboard from Wisconsin:

One player who fired himself into contention on Friday was Hideki Matsuyama, and it will be intriguing to see if he can remain there through moving day.

The Japanese golfer hit a disappointing 74 on Thursday but roared back up the leaderboard—74 places, to be exact—on Friday with a seven-under 65.

The U.S. Open shared the highlights via its official Twitter account:

PGATour.com's Sean Martin was impressed:

The world No. 4 is yet to win a major, but after bouncing back from a lacklustre opening day in some style, he will have his sights set on winning his first here at Erin Hills. How he fares on Saturday will certainly be worth watching.

One of the biggest early storylines running through the first two days was the ongoing struggles of a number of players considered among the favourites ahead of the tournament.

Dustin Johnson, Rory McIlroy, Adam Scott, Jason Day, Justin Rose and Henrik Stenson were all among the usual suspects who failed to make the cut at Erin Hills.

ESPN's Jason Sobel was surprised with the positivity displayed by Johnson and McIlroy:

One who remains in the hunt is Jordan Spieth, albeit he is seven shots behind the leaders at even par. Nevertheless, he believes he's still in the running.

Per Dejan Kalinic of Sporting News, he thinks he can take advantage of the forecast weather—thunderstorms on Saturday followed by heavy winds on Sunday—to earn his third major:

"We've got an interesting day tomorrow, and then we've got a really, really tough day on Sunday. If you're ever going to come from behind in a tournament, I don't think this is a bad option. I think Michael [Greller, caddie] and I were both talking, we're still very much in it.

"I think the winning score will be somewhere around where it is now, maybe a few strokes lower. With some heavy winds on Sunday, anything under par is going to move way up the board."

Richard Heathcote/Getty Images

Spieth only managed 71 on Friday, but he showed flashes of his quality. A sublime 50-yard bunker shot at the seventh set him up for a birdie, and he rescued a par at the 17th with an exquisite chip.

If everything can come together for him, he could soar up the leaderboard on moving day.

While they may not have the same draw as Fowler or have produced anything as dramatic as Casey's triple-bogey or five-consecutive birdies from Friday, Holmes and Lovemark's consistency thus far puts them in good stead going into the weekend.

Both carded 69 on Thursday and again on Friday. Several of their shots were included in the U.S. Open's collection of highlights from the second round:

It may not be as explosive as the scores of 65 and 66 we've seen from some players thus far, but if the pair can maintain their same level over the final two rounds, they'll stand an excellent chance of winning.

As such, they're definitely worth keeping an eye on.