| Grant Williams Rankings 2019-2020 | Stats Glossary  |
| Games with .331 or more Field-goals Percentage | Boston Celtics Record : 35 - 11 | Grant Williams |
| No | Date | Game | Res | Score | Field-goals Percentage |
| 1 | Sep 19 | at Miami | W | 117-106 | .500 |
| 2 | Sep 15 | vs Miami | L | 114-117 | .500 |
| 3 | Sep 9 | vs Toronto | L | 122-125 | 1.00 |
| 4 | Sep 7 | at Toronto | W | 111-89 | .500 |
| 5 | Sep 5 | vs Toronto | L | 93-100 | .500 |
| 6 | Sep 3 | vs Toronto | L | 103-104 | .400 |
| 7 | Sep 1 | at Toronto | W | 102-99 | .500 |
| 8 | Aug 23 | at Philadelphia | W | 110-106 | 1.00 |
| 9 | Aug 21 | at Philadelphia | W | 102-94 | .667 |
| 10 | Aug 19 | vs Philadelphia | W | 128-101 | 1.00 |
| 11 | Aug 11 | at Memphis | W | 122-107 | .333 |
| 12 | Aug 7 | at Toronto | W | 122-100 | .400 |
| 13 | Aug 5 | vs Brooklyn | W | 149-115 | 1.00 |
| 14 | Aug 2 | vs Portland | W | 128-124 | .333 |
| 15 | Mar 4 | at Cleveland | W | 112-106 | .667 |
| 16 | Mar 3 | vs Brooklyn | L | 120-129 | .333 |
| 17 | Feb 29 | vs Houston | L | 110-111 | 1.00 |
| 18 | Feb 23 | at L.A.Lakers | L | 112-114 | .500 |
| 19 | Feb 11 | at Houston | L | 105-116 | .500 |
| 20 | Feb 9 | at Oklahoma_City | W | 112-111 | 1.00 |
| 21 | Feb 7 | vs Atlanta | W | 112-107 | .600 |
| 22 | Feb 5 | vs Orlando | W | 116-100 | .833 |
| 23 | Feb 3 | at Atlanta | W | 123-115 | .667 |
| 24 | Feb 1 | vs Philadelphia | W | 116-95 | .667 |
| 25 | Jan 30 | vs Golden_State | W | 119-104 | .400 |
| 26 | Jan 28 | at Miami | W | 109-101 | .400 |
| 27 | Jan 24 | at Orlando | W | 109-98 | .600 |
| 28 | Jan 22 | vs Memphis | W | 119-95 | .333 |
| 29 | Jan 20 | vs L.A.Lakers | W | 139-107 | 1.00 |
| 30 | Jan 13 | vs Chicago | W | 113-101 | .500 |
| 31 | Jan 9 | at Philadelphia | L | 98-109 | .333 |
| 32 | Jan 6 | at Washington | L | 94-99 | 1.00 |
| 33 | Jan 4 | at Chicago | W | 111-104 | .333 |
| 34 | Jan 3 | vs Atlanta | W | 109-106 | .500 |
| 35 | Dec 27 | vs Cleveland | W | 129-117 | .333 |
| 36 | Dec 25 | at Toronto | W | 118-102 | .333 |
| 37 | Dec 22 | vs Charlotte | W | 119-93 | .833 |
| 38 | Dec 20 | vs Detroit | W | 114-93 | .800 |
| 39 | Dec 18 | at Dallas | W | 109-103 | .400 |
| 40 | Dec 9 | vs Cleveland | W | 110-88 | .333 |
| 41 | Dec 1 | at New_York | W | 113-104 | .400 |
| 42 | Nov 20 | at L.A.Clippers | L | 104-107 | .333 |
| 43 | Nov 18 | at Phoenix | W | 99-85 | .400 |
| 44 | Nov 15 | at Golden_State | W | 105-100 | 1.00 |
| 45 | Nov 1 | vs New_York | W | 104-102 | .500 |
| 46 | Oct 26 | at New_York | W | 118-95 | .750 |
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