Casey Schmitt hit a walk-off double in the 10th inning and the San Francisco Giants beat the Cincinnati Reds 6-5 on Sunday, but lost Jung Hoo Lee to a left shoulder injury. After the Reds failed to score in the top of the 10th off Giants reliever Luke Jackson (1-1), Schmitt's first hit of the season was a two-out ground-rule double to left-center field off Emilio Pagan (2-3), scoring automatic runner Luis Matos.