No. 1: Kelly Olynyk
Kelly Olynyk appeared in a total of nine summer league games for the Celtics in 2013 and 2014.
Before cementing himself as a staple for the rebuilding Celtics squads of the 2010s, Olynyk was their go-to option over the summer. In 2013, he averaged 18 points and 7.8 rebounds per game, and put up nearly identical numbers the following year. The teams went 3-2 both years.
In 2014, he began a budding on-court relationship with former Celtics point guard Marcus Smart that would be a cornerstone for the team throughout the next few seasons.
The Canadian forward has been a strong role player throughout his 12-year career and will suit up next year again for Toronto.