| Grant Williams Rankings 2020-2021 | Stats Glossary  |
| Games with 3 or more Defensive Rebounds | Boston Celtics Record : 11 - 10 | Grant Williams |
| No | Date | Game | Res | Score | Defensive Rebounds |
| 1 | May 28 | vs Brooklyn | W | 125-119 | 3 |
| 2 | May 16 | at New_York | L | 92-96 | 5 |
| 3 | May 15 | at Minnesota | W | 124-108 | 5 |
| 4 | May 5 | at Orlando | W | 132-96 | 3 |
| 5 | Apr 23 | at Brooklyn | L | 104-109 | 3 |
| 6 | Apr 15 | at L.A.Lakers | W | 121-113 | 5 |
| 7 | Mar 29 | vs New_Orleans | L | 109-115 | 4 |
| 8 | Mar 27 | at Oklahoma_City | W | 111-94 | 7 |
| 9 | Mar 24 | at Milwaukee | L | 119-121 | 5 |
| 10 | Mar 21 | vs Orlando | W | 112-96 | 4 |
| 11 | Mar 17 | at Cleveland | L | 110-117 | 3 |
| 12 | Mar 11 | at Brooklyn | L | 109-121 | 4 |
| 13 | Feb 12 | vs Detroit | L | 102-108 | 4 |
| 14 | Feb 9 | at Utah | L | 108-122 | 4 |
| 15 | Feb 5 | at L.A.Clippers | W | 119-115 | 4 |
| 16 | Jan 25 | at Chicago | W | 119-103 | 3 |
| 17 | Jan 24 | vs Cleveland | W | 141-103 | 3 |
| 18 | Jan 6 | at Miami | W | 107-105 | 3 |
| 19 | Jan 4 | at Toronto | W | 126-114 | 4 |
| 20 | Jan 1 | at Detroit | L | 93-96 | 3 |
| 21 | Dec 25 | vs Brooklyn | L | 95-123 | 4 |
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