US Open filled with limitless possibilities, few stars

Paula Dougherty of Murrieta, Calif., hugs her son Kevin after he finished the second round of the U.S. open golf tournament Friday, Jun

Martin Kaymer, of Germany, hits a shot on the 17th hole during the second round of the U.S. Open golf tournament Friday, June 16, 2017,

ERIN, Wis. (AP) — The U.S. Open is wide open going into the weekend.

Paul Casey, Brooks Koepka, Brian Harman and Tommy Fleetwood share the 36-hole lead at Erin Hills. And if that's not enough of a traffic jam at the top, 18 players are separated by three shots to start the third round.

But that's not all that makes the possibilities so limitless Saturday.

Only eight shots separate the leaders from the players who made the cut on the number. That's the lowest differential after 36 holes in the U.S. Open, mainly because until 2012, everyone within 10 shots of the lead made the cut at the U.S. Open.

Now consider that the largest 36-hole comeback in U.S. Open history was 11 shots by Lou Graham in 1975. It's wide open.