| Robert Williams III Rankings 2020-2021 | Stats Glossary  |
| Games with 2 or more Assists | Boston Celtics Record : 14 - 10 | Robert Williams III |
| No | Date | Game | Res | Score | Assists |
| 1 | May 9 | vs Miami | L | 124-130 | 2 |
| 2 | May 2 | vs Portland | L | 119-129 | 5 |
| 3 | Apr 30 | vs San_Antonio | W | 143-140 | 3 |
| 4 | Apr 13 | at Portland | W | 116-115 | 4 |
| 5 | Apr 9 | vs Minnesota | W | 145-136 | 5 |
| 6 | Apr 4 | vs Charlotte | W | 116-86 | 2 |
| 7 | Apr 2 | vs Houston | W | 118-102 | 8 |
| 8 | Mar 29 | vs New_Orleans | L | 109-115 | 5 |
| 9 | Mar 27 | at Oklahoma_City | W | 111-94 | 2 |
| 10 | Mar 26 | at Milwaukee | W | 122-114 | 6 |
| 11 | Mar 22 | at Memphis | L | 126-132 | 4 |
| 12 | Mar 21 | vs Orlando | W | 112-96 | 2 |
| 13 | Mar 19 | vs Sacramento | L | 96-107 | 2 |
| 14 | Mar 17 | at Cleveland | L | 110-117 | 3 |
| 15 | Mar 11 | at Brooklyn | L | 109-121 | 4 |
| 16 | Mar 2 | vs L.A.Clippers | W | 117-112 | 4 |
| 17 | Feb 28 | vs Washington | W | 111-110 | 2 |
| 18 | Feb 26 | vs Indiana | W | 118-112 | 4 |
| 19 | Feb 21 | at New_Orleans | L | 115-120 | 3 |
| 20 | Feb 16 | vs Denver | W | 112-99 | 2 |
| 21 | Feb 3 | at Sacramento | L | 111-116 | 2 |
| 22 | Jan 30 | vs L.A.Lakers | L | 95-96 | 2 |
| 23 | Jan 3 | at Detroit | W | 122-120 | 2 |
| 24 | Dec 30 | vs Memphis | W | 126-107 | 2 |
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