| Marcus Smart Rankings 2018-2019 | Stats Glossary  |
| Games with 12 or more Efficiency Recap | Boston Celtics Record : 24 - 11 | Marcus Smart |
| No | Date | Game | Res | Score | Efficiency Recap |
| 1 | Apr 3 | at Miami | W | 112-102 | 14 |
| 2 | Apr 1 | vs Miami | W | 110-105 | 13 |
| 3 | Mar 29 | vs Indiana | W | 114-112 | 12 |
| 4 | Mar 26 | at Cleveland | W | 116-106 | 28 |
| 5 | Mar 16 | vs Atlanta | W | 129-120 | 27 |
| 6 | Mar 14 | vs Sacramento | W | 126-120 | 12 |
| 7 | Mar 11 | at L.A.Clippers | L | 115-140 | 12 |
| 8 | Mar 9 | at L.A.Lakers | W | 120-107 | 20 |
| 9 | Mar 6 | at Sacramento | W | 111-109 | 15 |
| 10 | Mar 5 | at Golden_State | W | 128-95 | 12 |
| 11 | Mar 3 | vs Houston | L | 104-115 | 23 |
| 12 | Mar 1 | vs Washington | W | 107-96 | 18 |
| 13 | Feb 27 | vs Portland | L | 92-97 | 21 |
| 14 | Feb 23 | at Chicago | L | 116-126 | 14 |
| 15 | Feb 13 | vs Detroit | W | 118-110 | 16 |
| 16 | Feb 5 | at Cleveland | W | 103-96 | 21 |
| 17 | Feb 3 | vs Oklahoma_City | W | 134-129 | 26 |
| 18 | Jan 28 | vs Brooklyn | W | 112-104 | 26 |
| 19 | Jan 18 | vs Memphis | W | 122-116 | 29 |
| 20 | Jan 16 | vs Toronto | W | 117-108 | 12 |
| 21 | Jan 10 | at Miami | L | 99-115 | 14 |
| 22 | Jan 7 | vs Brooklyn | W | 116-95 | 17 |
| 23 | Jan 4 | vs Dallas | W | 114-93 | 19 |
| 24 | Jan 2 | vs Minnesota | W | 115-102 | 12 |
| 25 | Dec 23 | vs Charlotte | W | 119-103 | 13 |
| 26 | Dec 19 | vs Phoenix | L | 103-111 | 17 |
| 27 | Dec 15 | at Detroit | L | 104-113 | 26 |
| 28 | Dec 12 | at Washington | W | 130-125 | 21 |
| 29 | Dec 1 | at Minnesota | W | 118-109 | 13 |
| 30 | Nov 30 | vs Cleveland | W | 128-95 | 24 |
| 31 | Nov 24 | at Dallas | L | 104-113 | 18 |
| 32 | Nov 19 | at Charlotte | L | 112-117 | 16 |
| 33 | Nov 9 | at Utah | L | 115-123 | 21 |
| 34 | Nov 5 | at Denver | L | 107-115 | 17 |
| 35 | Oct 27 | at Detroit | W | 109-89 | 16 |
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