KISSIMMEE, Fla. — A congratulatory text message arrived from Brad Peacock’s parents before the Astros righthander even had a chance to tell them he’d been named the team’s No. 4 starter. “I can’t even explain how fortunate I am right now,” said Peacock, who beat out Alex White for the spot. “I can’t thank the Astros enough for giving me this opportunity and I’m going to take advantage of it.” Peacock’s father is waiting for him in Houston, having already driven the pitcher’s truck to his new home city. Peacock’s parents have long supported and been devoted to their son’s chosen profession. “I think they’re more excited than I am. [...]