ST. LOUIS – The Astros’ No. 1 starter is at a career crossroads. The rebuilding club’s former No. 2 starter recently became a reluctant, frustrated reliever. Veterans on short-term deals are still receiving significant playing time on a struggling team that lost 5-4 to the St. Louis Cardinals on Wednesday and exited Busch Stadium 27 games below .500 with just three contests remaining before the All-Star break. But despite season-long expectations the Astros will be heavy sellers before the July 31 non-waiver trade deadline and conventional baseball wisdom saying at least a few moves should be made to shake up a directionless team, general manager Jeff Luhnow has been saying [...]