For example, all hits were automatically grounders, with no provisions for flyballs. The Rangers would score from second on infield grounders twice in the game. Consecutive fielder's choice grounders put Mike Gallego at first with two outs. As a kid, Ryan would accompany his father to Southern Maine practices, and field grounders. His ability for picking grounders prompted the Pirates to purchase Mendoza's contract from Mexico City. He later returns, surviving being tortured by the Grounders. With this information, Clarke realizes they have something to offer the Grounders. Nightbloods are Grounders with black blood; they are the only Grounders who can become commanders. In "Thirteen," the Grounders celebrate their Ascension Day, a holy day for Grounders. Grounders were the primary antagonists of the first season.