| Robert Williams III Rankings 2020-2021 | Stats Glossary  |
| Games with 1 or more Free-throws Made | Boston Celtics Record : 14 - 10 | Robert Williams III |
| No | Date | Game | Res | Score | Free-throws Made |
| 1 | May 22 | at Brooklyn | L | 93-104 | 1 |
| 2 | May 18 | vs Washington | W | 118-100 | 2 |
| 3 | May 2 | vs Portland | L | 119-129 | 1 |
| 4 | Apr 30 | vs San_Antonio | W | 143-140 | 2 |
| 5 | Apr 4 | vs Charlotte | W | 116-86 | 2 |
| 6 | Apr 2 | vs Houston | W | 118-102 | 2 |
| 7 | Mar 29 | vs New_Orleans | L | 109-115 | 1 |
| 8 | Mar 27 | at Oklahoma_City | W | 111-94 | 5 |
| 9 | Mar 26 | at Milwaukee | W | 122-114 | 1 |
| 10 | Mar 22 | at Memphis | L | 126-132 | 3 |
| 11 | Mar 17 | at Cleveland | L | 110-117 | 1 |
| 12 | Mar 14 | at Houston | W | 134-107 | 2 |
| 13 | Mar 4 | vs Toronto | W | 132-125 | 2 |
| 14 | Mar 2 | vs L.A.Clippers | W | 117-112 | 5 |
| 15 | Feb 26 | vs Indiana | W | 118-112 | 2 |
| 16 | Feb 14 | at Washington | L | 91-104 | 3 |
| 17 | Feb 9 | at Utah | L | 108-122 | 2 |
| 18 | Feb 7 | at Phoenix | L | 91-100 | 1 |
| 19 | Feb 3 | at Sacramento | L | 111-116 | 1 |
| 20 | Jan 24 | vs Cleveland | W | 141-103 | 1 |
| 21 | Jan 22 | at Philadelphia | L | 110-122 | 2 |
| 22 | Jan 6 | at Miami | W | 107-105 | 2 |
| 23 | Jan 4 | at Toronto | W | 126-114 | 3 |
| 24 | Jan 3 | at Detroit | W | 122-120 | 1 |
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