| Grant Williams Rankings 2019-2020 | Stats Glossary  |
| Games with 1 or more 3-point Made | Boston Celtics Record : 19 - 8 | Grant Williams |
| No | Date | Game | Res | Score | 3-point Made |
| 1 | Sep 19 | at Miami | W | 117-106 | 1 |
| 2 | Sep 15 | vs Miami | L | 114-117 | 1 |
| 3 | Sep 9 | vs Toronto | L | 122-125 | 2 |
| 4 | Sep 7 | at Toronto | W | 111-89 | 1 |
| 5 | Sep 3 | vs Toronto | L | 103-104 | 1 |
| 6 | Aug 23 | at Philadelphia | W | 110-106 | 1 |
| 7 | Aug 21 | at Philadelphia | W | 102-94 | 1 |
| 8 | Aug 19 | vs Philadelphia | W | 128-101 | 2 |
| 9 | Aug 13 | vs Washington | L | 90-96 | 1 |
| 10 | Aug 11 | at Memphis | W | 122-107 | 1 |
| 11 | Aug 5 | vs Brooklyn | W | 149-115 | 1 |
| 12 | Mar 8 | vs Oklahoma_City | L | 104-105 | 1 |
| 13 | Feb 11 | at Houston | L | 105-116 | 1 |
| 14 | Feb 9 | at Oklahoma_City | W | 112-111 | 1 |
| 15 | Feb 7 | vs Atlanta | W | 112-107 | 1 |
| 16 | Feb 5 | vs Orlando | W | 116-100 | 3 |
| 17 | Jan 24 | at Orlando | W | 109-98 | 3 |
| 18 | Jan 20 | vs L.A.Lakers | W | 139-107 | 1 |
| 19 | Jan 16 | at Milwaukee | L | 123-128 | 1 |
| 20 | Jan 13 | vs Chicago | W | 113-101 | 1 |
| 21 | Jan 6 | at Washington | L | 94-99 | 1 |
| 22 | Jan 4 | at Chicago | W | 111-104 | 1 |
| 23 | Jan 3 | vs Atlanta | W | 109-106 | 1 |
| 24 | Dec 22 | vs Charlotte | W | 119-93 | 1 |
| 25 | Dec 20 | vs Detroit | W | 114-93 | 2 |
| 26 | Dec 18 | at Dallas | W | 109-103 | 1 |
| 27 | Dec 9 | vs Cleveland | W | 110-88 | 1 |
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