There's no telling who will fall victim to the diabolical test of a U.S. Open, which is perhaps why it's one of golf's most intriguing and storied traditions. It's redemption for golf fans, who finally get an opportunity to watch the pros—who wreak havoc on courses with birdie barrages week in and week out—wrestle this bear of a golf course.
Sometimes, though, you can hardly believe your eyes.
Scanning the leaderboard to find Billy Horschel's name perched at the top hardly computes considering it's his second-ever major championship appearance. Or even more surprising are the names well below the current cut line (+6), ranging from some of golf's most consistent players like Matt Kuchar to past champions of this very event like Jim Furyk.
Merion Golf Club proved treacherous on Day 2 and revealed the blend of skill and discipline that's required to win on golf's biggest stage. Let's look at the biggest surprises from Friday.