Jason Day was 6 up through 10 holes against Zach Johnson , Matt Kuchar was 3 up over Hiroyuki Fujita through 14 .
Defending champion Hunter Mahan was 4 up at the turn against Matteo Manassero .
Jason Day was 6 up through 10 holes against Zach Johnson , Matt Kuchar was 3 up over Hiroyuki Fujita through 14 , and defending champion Hunter Mahan was 4 up at the turn against Matteo Manassero .