Miller, on the 60-day disabled list, will start for Triple-A Iowa against the Astros' minor league affiliate in nearby Round Rock on Wednesday. Miller, a former Astro, was with the Cubs in Houston, where they opened a three-game series on Monday. (Updated 8/15/2006) Analysis: Miller hasn't pitched this season as he recovers from arthroscopic surgery on his right shoulder. "It seems to be getting better as I'm going," said Miller, who was 4-4 with a 4.95 ERA in 16 starts with Boston in 2005. "Hopefully, this will be my final step." Miller, who signed a one-year contract with Chicago in January, wants to return to the Cubs next season.