Free-agent outfielder Colby Rasmus is headed to Houston.  The Astros have agreed to a one-year contract with the 28-year-old, worth a reported eight-million-dollars.  Rasmus hit just .225 with Toronto last season, but belted 18 home runs in just 104 games.  He's expected to take over in center field after Dexter Fowler was traded to the Cubs on Monday.  Rasmus is a career .246 hitter with 116 home runs in six seasons with the Blue Jays and Cardinals.