Blown saves, poor defense and an inconsistent offense are overshadowing improvement from the Astros’ starting pitchers. The club still holds the worst team ERA (4.94) in MLB, and starters possess a 4.70 mark, which tops only Minnesota and Toronto. But during the Astros’ last 11 games, starters have combined for a 3.69 ERA while recording seven quality starts. Dallas Keuchel threw eight innings of two-run ball before the Rangers scored four in the ninth on him in their 6-1 win Sunday. A six-man rotation recently was implemented partly because the club has six strong starting arms, highlighted by the promise of rookies Jarred Cosart, Brad Peacock and Brett Oberholtzer. A [...]