The Warriors (2-3) closed out the 2014 Summer League schedule with a 79-74 loss to the Bucks (1-4) on Friday night in Las Vegas.
Guard Aaron Craft was the only Warrior to score double-figures, coming off the bench to score 10 points.
Forward Rob Loe led Warriors' starters with nine points in in 18 minutes.
Guard Nemanja Nedovic played seven minutes, scoring four points and dishing out four assists.
Jabari Parker, the No. 2 overall pick in the NBA Draft, led the Bucks with 20 points.