Giants lose 7-6 to Padres on walk-off balk by Casilla
SAN DIEGO — The Giants felt pretty good after Buster Posey hit an opposite-field, leadoff homer in the 10th inning to give them the lead against San Diego. Moments later, San Francisco lost in a most unusual way. Adam Rosales singled in the tying run before Santiago Casilla balked home the winner, and the Padres