By Aran Smith 7/15/07 Link: NBA.com Official Summer League Site The top performers of day nine were Randy Foye, Craig Smith, Rudy Gay, Reyshawn Terry, DJ Strawberry, and Nate Robinson. (5-0) Dallas Mavericks 91 – (3-2) Boston Celtics 70 Boxscore Behind the steady and clutch play of JJ Barea, the Mavericks completed their undefeated run…