The Mavericks have their roster put together, so it's time to break down exactly what they have.Over the next few days, we'll go position by position to analyze where they stack up in the Western Conference. We'll start with the guards.Starters: Deron Williams, Wesley Matthews.Backups: Devin Harris, J.J. Barea, Seth Curry, Jonathan Gibson.OutlookThe Mavericks have the same starting backcourt as last season, but they expect it to be better because of Matthews' health.