(Portland, OR)  --  The Portland Trail Blazers are announcing their roster for the upcoming Las Vegas Summer League.  Newly acquired forward Noah Vonleh [[ von-LAY ]] and rookie guard Pat Connaughton are headed to Sin City.  Point guard  Tim Frazier and third-year wing Allen Crabbe are also on the roster.  Meyers Leonard will make his fourth straight summer appearance.  The Blazers open their schedule on Saturday against Boston.