By Andrew Both CHARLOTTE, North Carolina (Reuters) - Veteran Phil Mickelson used his short game magic to claw his way within three strokes of halfway leader Andrew Loupe after the second round of the Wells Fargo Championship at Quail Hollow on Friday. On a day when defending champion Rory McIlroy roared into contention before a bogey-bogey finish left him trailing by six, Mickelson hit only nine greens in regulation but used his vaunted touch around the greens to card a two-under-par 70. Mickelson, a five-times major champion who needs only to win the U.S. Open next month to complete the elusive career Grand Slam, got up-and-down to save par eight times, his lone bogey coming at his final hole, where he drove into a fairway bunker. More...