CHICAGO — With an excess of now-healthy starting pitching depth — something envied by almost every team in Major League Baseball — the Mariners have made a decision on how to incorporate Bryce Miller back onto their MLB roster. Prior to Saturday’s game at Rate Field, Mariners manager Dan Wilson announced that the team will go to a six-man rotation for the time being with Miller scheduled to be reinstated from the injured list during the upcoming series in Houston. “Our plan is that Bryce will slide into that third day in Houston, which I believe is the 13th,” Wilson said. Indeed, Miller will pitch Wednesday in Game 3 of the four-game series vs. the rival Astros at Daikin Park. The Mariners will reslot their rotation, moving Luis Castillo and Emerson Hancock around. The current pitching probables: Saturday — Luis Castillo vs. White Sox Sunday — Logan Gilbert vs. White Sox Monday — Bryan Woo vs. Astros Tuesday — George Kirby vs. Astros Wednesday — Bryce Miller vs. Astros Thursday — Luis Castillo vs.…