As they embark on their final road trip of the season, the San Francisco Giants hope they'll still have something to play for when they return home. The defending World Series champions begin a six-game trek Tuesday night against the San Diego Padres faced with the possibility of being eliminated from postseason contention prior to next week's series with NL West-leading Los Angeles. San Francisco (78-71) hosts its archrival next Monday after three games against the Padres and three in Oakland.