Cameron Smith, the second-ranked golfer in the world and No. 3 in the FedEx Cup standings, has withdrawn from the BMW Championship at Wilmington Country Club in Wilmington, Delaware, because of hip discomfort. Bud Martin, Smith’s agent with Wasserman, announced Smith’s withdrawal Monday morning. “He has been dealing with some on and off hip discomfort for several months and thought it would be best to rest this week in his pursuit of the FedEx Cup,” the statement read. Smith, who won the Players Championship and the 150th Open Championship this year, is one of the favorites to win the FedEx…