| Robert Williams III Rankings 2020-2021 | Stats Glossary  |
| Games with 3 or more Fouls | Boston Celtics Record : 8 - 8 | Robert Williams III |
| No | Date | Game | Res | Score | Fouls |
| 1 | May 25 | at Brooklyn | L | 108-130 | 5 |
| 2 | Apr 11 | at Denver | W | 105-87 | 3 |
| 3 | Apr 9 | vs Minnesota | W | 145-136 | 3 |
| 4 | Apr 6 | vs Philadelphia | L | 96-106 | 6 |
| 5 | Apr 4 | vs Charlotte | W | 116-86 | 5 |
| 6 | Mar 29 | vs New_Orleans | L | 109-115 | 4 |
| 7 | Mar 21 | vs Orlando | W | 112-96 | 3 |
| 8 | Mar 17 | at Cleveland | L | 110-117 | 4 |
| 9 | Feb 28 | vs Washington | W | 111-110 | 4 |
| 10 | Feb 26 | vs Indiana | W | 118-112 | 3 |
| 11 | Feb 21 | at New_Orleans | L | 115-120 | 3 |
| 12 | Feb 19 | vs Atlanta | W | 121-109 | 4 |
| 13 | Feb 16 | vs Denver | W | 112-99 | 3 |
| 14 | Feb 14 | at Washington | L | 91-104 | 3 |
| 15 | Jan 30 | vs L.A.Lakers | L | 95-96 | 4 |
| 16 | Dec 27 | at Indiana | L | 107-108 | 3 |
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