| | SG | Signed/Offer Sheet (The Dallas Mavericks signed F-G Justin Holiday.) |
| | PF | Waived (The Dallas Mavericks waived F Chris Silva.) |
| | PF | Traded (The Brooklyn Nets traded F Markieff Morris to the Dallas Mavericks.) From |
| | PG | Traded (The Brooklyn Nets traded G Kyrie Irving to the Dallas Mavericks.) From |
| | PF | Traded (The Dallas Mavericks traded F Dorian Finney-Smith to the Brooklyn Nets.) To |
| | PG | Traded (The Dallas Mavericks traded G Spencer Dinwiddie to the Brooklyn Nets.) To |
| | PF | Signed to 10-Day Contract (The Dallas Mavericks signed F Chris Silva to a 10-Day Contract.) |
| | PG | Waived (The Dallas Mavericks waived G Kemba Walker.) |
| | SG | Waived (The Dallas Mavericks waived G Tyler Dorsey.) |
| | SG | Signed/Offer Sheet (The Dallas Mavericks signed G A.J. Lawson.) |
| | SG | Recalled from Minors (The Dallas Mavericks recalled G Jaden Hardy.) |
| | PG | Signed/Offer Sheet (The Dallas Mavericks signed G Kemba Walker.) |
| | PG | Waived (The Dallas Mavericks waived G Facundo Campazzo.) |
| | SG | Assigned to Minors (The Dallas Mavericks assigned G Jaden Hardy to the G-League.) |
| | SG | Recalled from Minors (The Dallas Mavericks recalled G Jaden Hardy from the minors.) |
| | SG | Assigned to Minors (The Dallas Mavericks assigned G Jaden Hardy to the G-League.) |
| | PG | Signed as Free Agent (Signed) |
| | PG | Waived (Signed) |
| | PG | Re-Signed (Two-way contract) |
| | C | Waived (Signed) |
| | PF | Waived (Signed) |
| | SG | Waived (Signed) |
| | SG | Waived (Signed) |
| | C | Signed as Free Agent (Five year contract) |
| | PF | Signed as Free Agent (Signed) |
| | SG | Signed as Free Agent (Signed) |
| | SG | Signed as Free Agent (Signed) |
| | PG | Signed as Free Agent (Signed) |
| | PF | Re-Signed (Veteran Extension) |
| | SG | Signed as Free Agent (Two-Way Contract) |
| | C | Signed as Free Agent (Signed) |
| | SG | Signed as Draft Pick (Signed) |
| | SG | Signed as Free Agent (Signed) |
| | PG | Traded (Signed) To |
| | C | Traded (Signed) To |
| | FC | Traded (Signed) To |
| | SG | Traded (Signed) To |
| | PF | Traded (Signed) From |
| | SG | Traded (Signed) To |
| | SG | Traded (Signed) From |