CREATE TABLE table_14901 ("Date" TEXT, "Opponent" TEXT, "Score" TEXT, "Loss" TEXT, "Attendance" FLOAT, "Series" TEXT)

Who was the opponent with a series of 1-0?
SELECT "Opponent" FROM table_14901 WHERE "Series" = '1-0'
SELECT "Opponent" FROM "table_14901" WHERE "Series" = '1-0'