Six months ago, Nolan Ryan was the front-office face of the highly successful Texas Rangers. The club faltered down the stretch last season, though. The Rangers then had a rough offseason, which included the departure of slugger Josh Hamilton and failed pursuit of several premier free agents. Friday, the Rangers unexpectedly announced a front-office shakeup. According to the Fort Worth Star-Telegram’s Randy Galloway, Ryan could soon walk away from the club he’s helped build into annual contender — and one of the Astros’ new American League West foes. As a pitcher, Ryan spent more seasons (nine) with the Astros than any other team and was a key part of the [.]