Search Results
| Date | Team | Acquired | Relinquished | Notes |
| 2017-10-12 | Celtics | • Daniel Dixon | waived | |
| 2017-10-12 | Celtics | • Jonathan Holmes | waived | |
| 2017-10-12 | Celtics | • L.J. Peak | waived | |
| 2017-10-13 | Celtics | • Daniel Ochefu | signed free agent | |
| 2017-10-14 | Celtics | • Daniel Ochefu | waived | |
| 2017-10-30 | Celtics | • Jaylen Brown | team exercised $5.2M contract option through 2018-19 | |
| 2017-10-30 | Celtics | • Terry Rozier | team exercised $3.05M contract option through 2018-19 | |
| 2018-01-20 | Celtics | • Jarell Eddie | signed free agent to a 10-day contract | |
| 2018-01-30 | Celtics | • Jarell Eddie | waived | |
| 2018-02-01 | Celtics | • Jarell Eddie | player became a free agent | |
| 2018-02-08 | Celtics | • Greg Monroe | signed free agent to a 1-year, $5M contract | |
| 2018-03-28 | Celtics | • Xavier Silas | signed free agent to a 10-day contract | |
| 2018-04-06 | Celtics | • Xavier Silas | waived / player became a free agent | |
| 2018-04-06 | Celtics | • Jonathan Gibson | signed free agent for the remainder of the season | |
| 2018-06-21 | Celtics | • Robert Williams III | 2018 NBA draft first round pick (#27 overall) | |
| 2018-06-27 | Celtics | • Jabari Bird | team tendered qualifying offer, making player a restricted free agent | |
| 2018-06-27 | Celtics | • Marcus Smart | team tendered qualifying offer, making player a restricted free agent | |
| 2018-06-29 | Celtics | • Jonathan Gibson | team declined to tender qualifying offer, making player an unrestricted free agent | |
| 2018-07-01 | Celtics | • Aron Baynes | player became an unrestricted free agent | |
| 2018-07-01 | Celtics | • Greg Monroe | player became an unrestricted free agent | |
| 2018-07-01 | Celtics | • Shane Larkin | player became an unrestricted free agent | |
| 2018-07-02 | Celtics | • Brad Wanamaker | signed free agent to a 1-year, $838K contract | |
| 2018-07-05 | Celtics | • Robert Williams III | signed first round pick to a 2-year, $3.6M contract with a 2-year team option | |
| 2018-07-06 | Celtics | • Aron Baynes | re-signed unrestricted free agent to a 2-year, $10.6M contract | |
| 2018-07-15 | Celtics | • Kadeem Allen | waived |
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