| Marcus Smart Rankings 2019-2020 | Stats Glossary  |
| Games with 15 or more Efficiency Recap | Boston Celtics Record : 25 - 14 | Marcus Smart |
| No | Date | Game | Res | Score | Efficiency Recap |
| 1 | Sep 27 | at Miami | L | 113-125 | 16 |
| 2 | Sep 25 | vs Miami | W | 121-108 | 25 |
| 3 | Sep 19 | at Miami | W | 117-106 | 23 |
| 4 | Sep 15 | vs Miami | L | 114-117 | 17 |
| 5 | Sep 11 | at Toronto | W | 92-87 | 17 |
| 6 | Sep 9 | vs Toronto | L | 122-125 | 35 |
| 7 | Sep 7 | at Toronto | W | 111-89 | 19 |
| 8 | Aug 30 | at Toronto | W | 112-94 | 23 |
| 9 | Aug 21 | at Philadelphia | W | 102-94 | 23 |
| 10 | Aug 11 | at Memphis | W | 122-107 | 19 |
| 11 | Aug 5 | vs Brooklyn | W | 149-115 | 19 |
| 12 | Jul 31 | at Milwaukee | L | 112-119 | 19 |
| 13 | Mar 10 | at Indiana | W | 114-111 | 17 |
| 14 | Mar 8 | vs Oklahoma_City | L | 104-105 | 20 |
| 15 | Mar 6 | vs Utah | L | 94-99 | 17 |
| 16 | Mar 3 | vs Brooklyn | L | 120-129 | 23 |
| 17 | Feb 29 | vs Houston | L | 110-111 | 26 |
| 18 | Feb 26 | at Utah | W | 114-103 | 23 |
| 19 | Feb 23 | at L.A.Lakers | L | 112-114 | 16 |
| 20 | Feb 13 | vs L.A.Clippers | W | 141-133 | 27 |
| 21 | Feb 7 | vs Atlanta | W | 112-107 | 15 |
| 22 | Feb 1 | vs Philadelphia | W | 116-95 | 18 |
| 23 | Jan 30 | vs Golden_State | W | 119-104 | 20 |
| 24 | Jan 22 | vs Memphis | W | 119-95 | 20 |
| 25 | Jan 18 | vs Phoenix | L | 119-123 | 41 |
| 26 | Jan 16 | at Milwaukee | L | 123-128 | 23 |
| 27 | Jan 13 | vs Chicago | W | 113-101 | 23 |
| 28 | Jan 9 | at Philadelphia | L | 98-109 | 23 |
| 29 | Jan 3 | vs Atlanta | W | 109-106 | 26 |
| 30 | Nov 25 | vs Sacramento | W | 103-102 | 28 |
| 31 | Nov 22 | at Denver | L | 92-96 | 16 |
| 32 | Nov 20 | at L.A.Clippers | L | 104-107 | 15 |
| 33 | Nov 18 | at Phoenix | W | 99-85 | 18 |
| 34 | Nov 15 | at Golden_State | W | 105-100 | 16 |
| 35 | Nov 13 | vs Washington | W | 140-133 | 21 |
| 36 | Nov 11 | vs Dallas | W | 116-106 | 20 |
| 37 | Nov 9 | at San_Antonio | W | 135-115 | 19 |
| 38 | Oct 30 | vs Milwaukee | W | 116-105 | 21 |
| 39 | Oct 26 | at New_York | W | 118-95 | 18 |
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