Astros manager Brad Mills has spent time in both leagues and definitely would prefer to stay put. That could change, though, under a realignment plan Major League Baseball is exploring. MLB is considering a proposal that would have 15 teams in the American League and 15 clubs in the National League, as opposed to the present format of 16 teams in the NL and 14 in the AL. Under the possible plan, the leagues would not be split into divisions. The top three teams would make the playoffs. The fourth- and fifth-place clubs would be wild cards and play for one spot. Commissioner Bud Selig's committee for on-field matters, a panel that includes executives, managers and others, has discussed the change that would take effect in 2012. News of the possible realignment was first reported by Buster Olney, a senior writer at ESPN The Magazine. Read more: http://sports.espn.go.com/mlb/news/story?id=6659129