The Boston Red Sox trailed by five runs when Daniel Nava walked to lead off the bottom of the ninth inning, and the hopes of a second consecutive walk-off win were too remote to consider. "I don't think anybody saw that coming," Nava said, describing the "tempered excitement" in the dugout as the bases filled and emptied during a six-run ninth inning that gave Boston an 8-7 victory over the Seattle Mariners on Thursday night. "You could see it happening, but it was still too far off."