As the seventh hitter due up in the ninth inning, Matt Duffy knew he wasn't likely to get another at-bat. The Giants' young infielder calculated his chances anyway, down to the exact situation. Duffy singled in Gregor Blanco with two outs in the ninth inning to cap a two-run rally off closer Steve Cishek and lift San Francisco to a 3-2 win over the Miami Marlins on Sunday. ''I did the math ... and I knew if I did come up it would be bases loaded with two outs, ninth inning, tie game,'' Duffy said. More...