_ BOSTON — Brandon Laird, 25, with 73 career at-bats entering Friday, hit cleanup and played first base for the Astros at Fenway Park. Robbie Grossman, 23, with nine career at-bats, hit leadoff and roamed center field. Jose Altuve (22), Marwin Gonzalez (24), Matt Dominguez (23) and Jason Castro (25) composed the remainder of the Astros’ infield. Chris Carter (26) and Fernando Martinez (24) joined Grossman in the outfield at baseball’s oldest stadium. The Astros’ stalled youth movement took a step forward. But a rebuilding club again displaying major holes in its starting pitching staff and Nos. 4-6 hitters fell 7-3 to the Boston Red Sox on Friday night. Since [...]