MARANA, Arizona (Reuters) - PGA Tour rookie Russell Henley beat in-form South African Charl Schwartzel 1up to pull off the biggest early upset in the snow-delayed first round of the WGC-Accenture Match Play Championship on Thursday. The 23-year-old American, who clinched his maiden victory on the U.S. circuit at last month's Sony Open, never trailed and held off a late fightback by the 2011 Masters champion with pars on the last three holes. ...