Other than, somehow, the Red Sox, there likely isn’t a better starting rotation in the American League at present than the Mariners. It is arguably the deepest staff and boasted the best strikeout rate in baseball (26.8%) and the third-lowest walk rate (5.8%) entering Friday. A daunting matchup for any lineup, especially for one hovering slightly above league average in runs per game (4.58), I mean, these Astros haven’t had much of an issue...