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U.S. Open 2013, Merion Golf Club: Billy Horschel Hits Every 2nd-round Green, Finds U.S. Open Lead At Merion

Phil Mickelson of United States reacts to his biddy putt on the 18th green finishing his second round of the US Open at Merio
Phil Mickelson of United States reacts to his biddy putt on the 18th green finishing his second round of the US Open at Merion Golf Club June 14, 2013 in Ardmore, Pennsylvania. AFP PHOTO/Brendan SMIALOWSKI (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)

Sixty-eight players will return to Merion Golf Club still needing to complete their second round before the cut can be made at the U.S. Open.

And then there's Tiger Woods, who played 24 holes (plus a putt) Friday and stands four shots back at 3 over, nursing an injured left arm that hasn't been helped by Merion's thick roughs.

We'll keep you posted on all the top developments during the third day of U.S. Open play at Merion – and scroll down for our previous coverage.

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