As the Astros plunge toward this season of massive transition, they introduced on Wednesday a revamped broadcasting team highlighted by a familiar face and a decidedly unfamiliar voice. Alan Ashby, an Astros fan favorite for 11 seasons as a player and eight years as broadcaster before his abrupt dismissal after the 2005 season, returns as part of the on-air team for the Astros’ new television affiliate, Comcast SportsNet Houston. Ashby will be joined by Bill Brown, who will reduce his workload to a hundred games in his 27th season with the ballclub, and by former major league infielder Geoff Blum, who helped dash Houston’s lone trip to the World Series [...]