CREATE TABLE table_5509 ("RBIs" FLOAT, "Player" TEXT, "Team" TEXT, "Date" TEXT, "Opponent" TEXT)

Which player is associated with the date May 10, 1999?
SELECT "Player" FROM table_5509 WHERE "Date" = 'may 10, 1999'
SELECT "Player" FROM "table_5509" WHERE "Date" = 'may 10, 1999'