| Robert Williams III Rankings 2021-2022 | Stats Glossary  |
| Games with 6 or more Defensive Rebounds | Boston Celtics Record : 23 - 11 | Robert Williams III |
| No | Date | Game | Res | Score | Defensive Rebounds |
| 1 | Jun 10 | vs Golden_State | L | 97-107 | 8 |
| 2 | Jun 8 | vs Golden_State | W | 116-100 | 7 |
| 3 | May 25 | at Miami | W | 93-80 | 7 |
| 4 | May 17 | at Miami | L | 107-118 | 7 |
| 5 | Mar 23 | vs Utah | W | 125-97 | 8 |
| 6 | Mar 20 | at Denver | W | 124-104 | 7 |
| 7 | Mar 16 | at Golden_State | W | 110-88 | 6 |
| 8 | Mar 6 | vs Brooklyn | W | 126-120 | 6 |
| 9 | Mar 3 | vs Memphis | W | 120-107 | 10 |
| 10 | Mar 1 | vs Atlanta | W | 107-98 | 9 |
| 11 | Feb 24 | at Brooklyn | W | 129-106 | 8 |
| 12 | Feb 13 | vs Atlanta | W | 105-95 | 8 |
| 13 | Feb 11 | vs Denver | W | 108-102 | 10 |
| 14 | Feb 4 | at Detroit | W | 102-93 | 9 |
| 15 | Feb 2 | vs Charlotte | W | 113-107 | 6 |
| 16 | Jan 29 | at New_Orleans | W | 107-97 | 13 |
| 17 | Jan 28 | at Atlanta | L | 92-108 | 6 |
| 18 | Jan 25 | vs Sacramento | W | 128-75 | 10 |
| 19 | Jan 15 | vs Chicago | W | 114-112 | 9 |
| 20 | Jan 14 | at Philadelphia | L | 99-111 | 10 |
| 21 | Jan 12 | at Indiana | W | 119-100 | 6 |
| 22 | Jan 10 | vs Indiana | W | 101-98 | 6 |
| 23 | Jan 6 | at New_York | L | 105-108 | 6 |
| 24 | Dec 31 | vs Phoenix | W | 123-108 | 7 |
| 25 | Dec 27 | at Minnesota | L | 103-108 | 8 |
| 26 | Dec 25 | at Milwaukee | L | 113-117 | 8 |
| 27 | Dec 22 | vs Cleveland | W | 111-101 | 7 |
| 28 | Dec 17 | vs Golden_State | L | 107-111 | 6 |
| 29 | Dec 13 | vs Milwaukee | W | 117-103 | 6 |
| 30 | Nov 22 | vs Houston | W | 108-90 | 12 |
| 31 | Nov 13 | at Cleveland | L | 89-91 | 11 |
| 32 | Oct 27 | vs Washington | L | 107-116 | 6 |
| 33 | Oct 25 | at Charlotte | W | 140-129 | 10 |
| 34 | Oct 20 | at New_York | L | 134-138 | 7 |
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