The Timberwolves will play five games, beginning July 12 at the COX Pavilion and the Thomas & Mack Center in Las Vegas. The schedule ends July 19.
At 7-foot, 278 pounds, Siler is one of two centers on the 12-man roster.
"My agent just said Minnesota is really looking at me and really wanted me on their summer league team," Siler said. "I'm just trying to use the opportunity to show myself off."