The Celtics announced their roster for both the Utah and Las Vegas summer leagues on Wednesday afternoon. Here's a look at the participants:
| Name | Position | Height/Weight | College |
| Eric Buckner | F/C | 6-10/220 | Georgia State |
| CJ Fair | F | 6-8/215 | Syracuse |
| Jonathan Holmes | F | 6-8/240 | Texas |
| RJ Hunter | G | 6-6/190 | Georgia State |
| Colton Iverson | C | 7-0/255 | Colorado State |
| Jordan Mickey | F | 6-8/235 | LSU |
| Malcolm Miller | F | 6-7/210 | Holy Cross |
| Royce O'Neale | F | 6-6/215 | Baylor |
| Terry Rozier | G | 6-1/190 | Lousiville |
| Marcus Smart | G | 6-4/220 | Oklahoma State |
| Marcus Thornton | G | 6-4/190 | William & Mary |
| Corey Walden | G | 6-2/189 | Eastern Kentucky |
| James Young | G/F | 6-6/215 | Kentucky |
As expected, the team is largely dominated by guards, with second-year players Marcus Smart and James Young headlining a group of six guys who play primarily in the back court.