| Grant Williams Rankings 2020-2021 | Stats Glossary  |
| Games with .197 or more Free-throws Percentage | Boston Celtics Record : 7 - 13 | Grant Williams |
| No | Date | Game | Res | Score | Free-throws Percentage |
| 1 | Jun 1 | at Brooklyn | L | 109-123 | 1.00 |
| 2 | May 30 | vs Brooklyn | L | 126-141 | 1.00 |
| 3 | May 16 | at New_York | L | 92-96 | 1.00 |
| 4 | May 15 | at Minnesota | W | 124-108 | .500 |
| 5 | May 12 | at Cleveland | L | 94-102 | .500 |
| 6 | May 11 | vs Miami | L | 121-129 | .500 |
| 7 | May 7 | at Chicago | L | 99-121 | 1.00 |
| 8 | Apr 22 | vs Phoenix | W | 99-86 | .500 |
| 9 | Apr 19 | vs Chicago | L | 96-102 | 1.00 |
| 10 | Mar 17 | at Cleveland | L | 110-117 | .750 |
| 11 | Mar 14 | at Houston | W | 134-107 | .500 |
| 12 | Feb 12 | vs Detroit | L | 102-108 | .500 |
| 13 | Feb 5 | at L.A.Clippers | W | 119-115 | 1.00 |
| 14 | Feb 3 | at Sacramento | L | 111-116 | .500 |
| 15 | Feb 2 | at Golden_State | W | 111-107 | .667 |
| 16 | Jan 25 | at Chicago | W | 119-103 | .667 |
| 17 | Jan 20 | at Philadelphia | L | 109-117 | .500 |
| 18 | Jan 17 | vs New_York | L | 75-105 | .250 |
| 19 | Jan 4 | at Toronto | W | 126-114 | 1.00 |
| 20 | Dec 27 | at Indiana | L | 107-108 | .250 |
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