| Robert Williams III Rankings 2021-2022 | Stats Glossary  |
| Games with 21 or more Efficiency Recap | Boston Celtics Record : 27 - 10 | Robert Williams III |
| No | Date | Game | Res | Score | Efficiency Recap |
| 1 | Jun 10 | vs Golden_State | L | 97-107 | 25 |
| 2 | Jun 8 | vs Golden_State | W | 116-100 | 24 |
| 3 | May 23 | vs Miami | W | 102-82 | 22 |
| 4 | May 17 | at Miami | L | 107-118 | 26 |
| 5 | Mar 27 | vs Minnesota | W | 134-112 | 24 |
| 6 | Mar 23 | vs Utah | W | 125-97 | 27 |
| 7 | Mar 20 | at Denver | W | 124-104 | 24 |
| 8 | Mar 16 | at Golden_State | W | 110-88 | 21 |
| 9 | Mar 11 | vs Detroit | W | 114-103 | 22 |
| 10 | Mar 9 | at Charlotte | W | 115-101 | 23 |
| 11 | Mar 6 | vs Brooklyn | W | 126-120 | 25 |
| 12 | Mar 3 | vs Memphis | W | 120-107 | 29 |
| 13 | Mar 1 | vs Atlanta | W | 107-98 | 27 |
| 14 | Feb 27 | at Indiana | L | 107-128 | 23 |
| 15 | Feb 24 | at Brooklyn | W | 129-106 | 24 |
| 16 | Feb 11 | vs Denver | W | 108-102 | 32 |
| 17 | Feb 8 | at Brooklyn | W | 126-91 | 25 |
| 18 | Feb 4 | at Detroit | W | 102-93 | 30 |
| 19 | Feb 2 | vs Charlotte | W | 113-107 | 23 |
| 20 | Jan 29 | at New_Orleans | W | 107-97 | 31 |
| 21 | Jan 25 | vs Sacramento | W | 128-75 | 37 |
| 22 | Jan 15 | vs Chicago | W | 114-112 | 29 |
| 23 | Jan 14 | at Philadelphia | L | 99-111 | 25 |
| 24 | Jan 10 | vs Indiana | W | 101-98 | 31 |
| 25 | Jan 8 | vs New_York | W | 99-75 | 25 |
| 26 | Jan 6 | at New_York | L | 105-108 | 25 |
| 27 | Dec 31 | vs Phoenix | W | 123-108 | 35 |
| 28 | Dec 29 | vs L.A.Clippers | L | 82-91 | 31 |
| 29 | Dec 25 | at Milwaukee | L | 113-117 | 26 |
| 30 | Dec 22 | vs Cleveland | W | 111-101 | 38 |
| 31 | Dec 18 | vs New_York | W | 114-107 | 23 |
| 32 | Nov 13 | at Cleveland | L | 89-91 | 34 |
| 33 | Nov 12 | vs Milwaukee | W | 122-113 | 25 |
| 34 | Nov 10 | vs Toronto | W | 104-88 | 27 |
| 35 | Oct 27 | vs Washington | L | 107-116 | 26 |
| 36 | Oct 25 | at Charlotte | W | 140-129 | 29 |
| 37 | Oct 20 | at New_York | L | 134-138 | 35 |
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