| Marcus Smart Rankings 2020-2021 | Stats Glossary  |
| Games with 3 or more Defensive Rebounds | Boston Celtics Record : 16 - 13 | Marcus Smart |
| No | Date | Game | Res | Score | Defensive Rebounds |
| 1 | Jun 1 | at Brooklyn | L | 109-123 | 5 |
| 2 | May 30 | vs Brooklyn | L | 126-141 | 5 |
| 3 | May 28 | vs Brooklyn | W | 125-119 | 3 |
| 4 | May 22 | at Brooklyn | L | 93-104 | 3 |
| 5 | May 7 | at Chicago | L | 99-121 | 7 |
| 6 | May 5 | at Orlando | W | 132-96 | 3 |
| 7 | May 2 | vs Portland | L | 119-129 | 6 |
| 8 | Apr 30 | vs San_Antonio | W | 143-140 | 3 |
| 9 | Apr 23 | at Brooklyn | L | 104-109 | 4 |
| 10 | Apr 22 | vs Phoenix | W | 99-86 | 4 |
| 11 | Apr 17 | vs Golden_State | W | 119-114 | 5 |
| 12 | Apr 15 | at L.A.Lakers | W | 121-113 | 6 |
| 13 | Apr 13 | at Portland | W | 116-115 | 3 |
| 14 | Apr 11 | at Denver | W | 105-87 | 3 |
| 15 | Apr 9 | vs Minnesota | W | 145-136 | 4 |
| 16 | Apr 7 | vs New_York | W | 101-99 | 3 |
| 17 | Apr 2 | vs Houston | W | 118-102 | 3 |
| 18 | Mar 31 | vs Dallas | L | 108-113 | 3 |
| 19 | Mar 26 | at Milwaukee | W | 122-114 | 7 |
| 20 | Mar 22 | at Memphis | L | 126-132 | 5 |
| 21 | Mar 21 | vs Orlando | W | 112-96 | 3 |
| 22 | Mar 19 | vs Sacramento | L | 96-107 | 4 |
| 23 | Jan 27 | at San_Antonio | L | 106-110 | 3 |
| 24 | Jan 25 | at Chicago | W | 119-103 | 5 |
| 25 | Jan 22 | at Philadelphia | L | 110-122 | 3 |
| 26 | Jan 20 | at Philadelphia | L | 109-117 | 4 |
| 27 | Jan 8 | vs Washington | W | 116-107 | 5 |
| 28 | Jan 6 | at Miami | W | 107-105 | 3 |
| 29 | Jan 1 | at Detroit | L | 93-96 | 3 |
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