CHARLOTTE, N.C. — For all the talk about the greens, Rory McIlroy's most important club was his driver Thursday in the Wells Fargo Championship. McIlroy kept the ball in play at Quail Hollow and gave himself plenty of birdie chances on a cloudy, soft afternoon. He ran off six birdies in a seven-hole stretch around the turn and finished with an 8-foot birdie putt for a 5-under 67 to share the lead with six other players.