Box score KISSIMMEE, Fla. – Just because the Astros have baseball’s lowest payroll doesn’t mean first-year manager Bo Porter is willing to give everything away. Or anything. Porter continues to treat the Astros’ regular-season starters like a high-security secret, despite the fact the majority of positions have been tentatively locked in since spring training began. Porter arrived in Kissimmee in early February preaching increased competition. He’s sticking to his plan to the point the only March 31 starters he’ll acknowledge with less than a week remaining at Osceola County Stadium are second baseman Jose Altuve, catcher Jason Castro and pitcher Bud Norris. Asked Friday about the Astros’ third- and first-base [...]