This article was originally published on www.si.com/nba/mavericks as Cooper Flagg named Summer League winner for Mavericks. Dallas Mavericks rookie Cooper Flagg only needed two appearances in the Las Vegas Summer League to prove that he is legit.

The Mavs lost their fourth and final Summer League game to the Philadelphia 76ers 90-82 on Wednesday night inside the Thomas & Mack Center in Las Vegas.