| Grant Williams Rankings 2019-2020 | Stats Glossary  |
| Games with 1 or more Offensive Rebounds | Boston Celtics Record : 28 - 11 | Grant Williams |
| No | Date | Game | Res | Score | Offensive Rebounds |
| 1 | Sep 11 | at Toronto | W | 92-87 | 2 |
| 2 | Sep 5 | vs Toronto | L | 93-100 | 1 |
| 3 | Sep 1 | at Toronto | W | 102-99 | 2 |
| 4 | Aug 17 | vs Philadelphia | W | 109-101 | 2 |
| 5 | Aug 13 | vs Washington | L | 90-96 | 1 |
| 6 | Mar 4 | at Cleveland | W | 112-106 | 1 |
| 7 | Mar 3 | vs Brooklyn | L | 120-129 | 2 |
| 8 | Feb 29 | vs Houston | L | 110-111 | 1 |
| 9 | Feb 23 | at L.A.Lakers | L | 112-114 | 1 |
| 10 | Feb 21 | at Minnesota | W | 127-117 | 2 |
| 11 | Feb 11 | at Houston | L | 105-116 | 1 |
| 12 | Feb 9 | at Oklahoma_City | W | 112-111 | 1 |
| 13 | Feb 5 | vs Orlando | W | 116-100 | 3 |
| 14 | Feb 3 | at Atlanta | W | 123-115 | 3 |
| 15 | Feb 1 | vs Philadelphia | W | 116-95 | 3 |
| 16 | Jan 30 | vs Golden_State | W | 119-104 | 2 |
| 17 | Jan 28 | at Miami | W | 109-101 | 3 |
| 18 | Jan 26 | at New_Orleans | L | 108-123 | 1 |
| 19 | Jan 24 | at Orlando | W | 109-98 | 1 |
| 20 | Jan 22 | vs Memphis | W | 119-95 | 1 |
| 21 | Jan 20 | vs L.A.Lakers | W | 139-107 | 1 |
| 22 | Jan 15 | vs Detroit | L | 103-116 | 1 |
| 23 | Jan 13 | vs Chicago | W | 113-101 | 4 |
| 24 | Jan 9 | at Philadelphia | L | 98-109 | 2 |
| 25 | Jan 6 | at Washington | L | 94-99 | 2 |
| 26 | Jan 4 | at Chicago | W | 111-104 | 1 |
| 27 | Dec 31 | at Charlotte | W | 109-92 | 1 |
| 28 | Dec 27 | vs Cleveland | W | 129-117 | 1 |
| 29 | Dec 22 | vs Charlotte | W | 119-93 | 1 |
| 30 | Dec 20 | vs Detroit | W | 114-93 | 3 |
| 31 | Dec 9 | vs Cleveland | W | 110-88 | 1 |
| 32 | Dec 6 | vs Denver | W | 108-95 | 1 |
| 33 | Dec 1 | at New_York | W | 113-104 | 1 |
| 34 | Nov 20 | at L.A.Clippers | L | 104-107 | 2 |
| 35 | Nov 18 | at Phoenix | W | 99-85 | 1 |
| 36 | Nov 9 | at San_Antonio | W | 135-115 | 1 |
| 37 | Nov 7 | at Charlotte | W | 108-87 | 1 |
| 38 | Oct 26 | at New_York | W | 118-95 | 1 |
| 39 | Oct 25 | vs Toronto | W | 112-106 | 6 |
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