Elliana Zellien allowed one earned run in five innings and Humacao’s offense did the rest as the Grises earned a doubleheader split against two-time defending champion Cidra on Sunday. By THE STAR STAFF The Bravas of Cidra, Grises of Humacao, Caribeñas of Salinas, Leonas of Ponce and Valencianas of Juncos all notched victories on Sunday in the Women’s Premier Softball League. The Grises pulled off the biggest surprise of the day by splitting a doubleheader with the two-time defending champion…