Result: Paul Casey leads Memorial Tournament as Rory McIlroy struggles on day two

Paul Casey of England watches his tee shot on the second hole during the third round of the Memorial Tournament presented by Nationwide Insurance at Muirfield Village Golf Club on May 31, 2014
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Paul Casey leads the Memorial Tournament by three shots as Rory McIlroy falls down the leaderboard on day two.

Paul Casey took a three-shot lead at the halfway stage of the Memorial Tournament by carding a 66 for the second day in a row in Ohio.

The Englishman, who has not recorded a victory in America since 2009, looked in fine form as he recorded six birdies and an eagle, but a dropped shot on the final hole saw him fall back to 12-under-par for the tournament.

Casey was helped in his climb to the top of the leaderboard by a disastrous day for Rory McIlroy as he threw away his first-round lead.

After shooting a 63 on Thursday, the former world number one struggled to replicate similar form, with three successive double-bogeys on the front nine summing up the day as his 78 left him nine shots behind the leader.

Bubba Watson is in second place heading into the weekend on nine-under, with fellow American Chris Kirk a further shot back.

Rory McIlroy of Northern Ireland plays a shot during the final round of the 56th Kolon Korea Open 2013 at the Woo Jeong Hills Country Club on October 20, 2013
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