First-round draft pick Kelly Olynyk continued his strong play in the NBA Summer League in Orlando, accumulating 21 points, nine rebounds and four assists Tuesday to lead the Celtics  to a 76-74 victory over the Pacers.
Olynyk, who is averaging 19.7 points through three games for the 2-1 Celtics, hit 9-of-19 shots and was a plus-15 in almost 30 minutes of action. Tony Mitchell added 15 points for Boston. Phil Pressey had 11 points, five assists and three steals, and he hit two free throws with 10 seconds left for the winning points.
Solomon Hill led the Pacers with 15 points.
The Celtics led by 11 at the half but allowed Indiana to tie the game at 74 with 38 seconds left on a 3-pointer by Donald Sloan that capped a 9-0 run. On the Celtics’ ensuing possession, Olynyk missed a hook shot in the paint.
Sloan then came up short on a drive as second-round pick Colton Iverson stepped in to cut off his path. Pressey, the son of former Celtics assistant coach Paul Pressey, grabbed the rebound and was fouled in the backcourt. He calmly sank both free throws to put the C’s back in front.
The Pacers had the final shot, but Sloan missed a wide-open 3-pointer at the buzzer that could have won it.
In addition to members of the Celtics front office and coaching staff, veteran forward Jeff Green  was on hand to watch the game and came away with good feelings about Olynyk.
“He can play at a high level,” Green said in an interview with NBA TV after the game. “He can really move for a big guy. I’m impressed.”
“It’s all about opportunity,” Green said. “And right now I definitely have the opportunity to showcase what I can do without those guys there. I’m looking forward to it. I’ve been working. I’ve been working hard to better my game in all aspects. So, I’m looking forward to the challenge I have upon me, and I’ll be ready.”
Green also had the opportunity to meet new coach Brad Stevens .
“We spoke today,” Green said. “We walked over to the gym today, had a great time picking his brain. Just a smart, smart guy. He loves the game. I think he’s looking forward to the challenge. College coaches coming in with the transition to the NBA, it’s going to be tough. But I think he’s up for the challenge. He’s going to do whatever it takes to make us better.”
The Celtics play again Wednesday at 3 p.m. vs. the Rockets, then they have a playoff game Friday to close out their week in Orlando.