The second round of the US Open will have to be completed this afternoon at the Merion Club in Pennsylvania.
Americans Billy Horschel and Phil Mickelson finished their rounds and share the lead on 1 under in the clubhouse.
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Rory McIlroy and Tiger Woods finished 3-over par and will likely play the third round together.
Yet to finish their second rounds, Padraig Harrington is on 4 over and Irish amateur qualifier Kevin Phelan is on 6 over.