Barbara Goleman High softball player, Natalie Costero, marveled at Miami Marlins outfielder Giancarlo Stanton’s composure each time he steps up to the plate.In fact, Costero watches video of the three-time All-Star to emulate his game and to make her a better player.“I like that he’s focused on every pitch, and each time at bat he has a plan,” said the senior shortstop and pitcher. “I need to have a plan like...