Kelly Olynyk officially signs with the Boston Celtics

What a day for Kelly Olynyk. After a tremendous 25-point performance in his NBA summer league debut, the Boston Celtics announced that they have signed him to his rookie contract.

Terms of the deal were not announced but the rookie pay scale is set at $1.66 million for the 13th pick in the draft. Teams are allowed to pay up to 120 percent more -- which most NBA teams usually do -- so it's likely Olynyk will have a first-year salary close to $2 million.

It's fitting that 7-foot big man out of Gonzaga gets rewarded on the same day that he went out and demonstrated that he could become a talented player in the NBA. In addition to his impressive 25 points, Olynyk had 7 rebounds, 2 assists, and 2 steals. Summer league head coach Jay Larranaga was very impressed with what he saw.

"He can shoot, he can pass, he can dribble," said Larranaga. "He plays defensively, he talks; maybe one of his greatest strengths is how well he talks the game and stays connected to his teammates."

The new head coach of the Boston Celtics, Brad Stevens, was also extremely pleased with Kelly Olynyk's performance on Sunday, "I really like his game. He's really bright, you can tell he makes others around him better. I thought he did some good things defensively as well. He's going to be a good player."