It was tough enough for the Los Angeles Dodgers to watch Melvin Upton Jr.'s two-run, walk-off home run Friday night. Then came Yangervis Solarte's walk-off walk with two outs in the 11th inning Saturday night, which gave the San Diego Padres a 3-2 victory. ''We've finding different ways to lose games,'' manager Dave Roberts said after the Dodgers dropped their fourth straight and sixth in seven.