Mike Zunino hit two home runs and Kyle Seager added a third for the Seattle Mariners, but the San Francisco Giants rallied from a four-run deficit in the top of the ninth inning with minor leaguers Saturday in a 9-8 split-squad victory. Zunino connected in the second inning off Giants starter Jake Peavy and again in the sixth off big league reliever Jeremy Affeldt. The Mariners fielded a starting lineup with eight players expected to start on opening day. The Giants had some of their regulars playing in a futures game at the same time.