| Garrison Mathews Rankings 2020-2021 | Stats Glossary  |
| Games with 6 or more Efficiency Recap | Washington Wizards Record : 10 - 15 | Garrison Mathews |
| No | Date | Game | Res | Score | Efficiency Recap |
| 1 | May 14 | vs Cleveland | W | 120-105 | 6 |
| 2 | May 5 | at Milwaukee | L | 134-135 | 8 |
| 3 | Apr 30 | at Cleveland | W | 122-93 | 10 |
| 4 | Apr 25 | vs Cleveland | W | 119-110 | 10 |
| 5 | Apr 5 | at Toronto | L | 101-103 | 14 |
| 6 | Mar 27 | vs Detroit | W | 106-92 | 6 |
| 7 | Mar 25 | at New_York | L | 102-106 | 21 |
| 8 | Mar 23 | at New_York | L | 113-131 | 7 |
| 9 | Mar 12 | vs Philadelphia | L | 101-127 | 8 |
| 10 | Mar 10 | at Memphis | L | 112-127 | 11 |
| 11 | Feb 27 | vs Minnesota | W | 128-112 | 25 |
| 12 | Feb 25 | at Denver | W | 112-110 | 8 |
| 13 | Feb 23 | at L.A.Clippers | L | 116-135 | 10 |
| 14 | Feb 22 | at L.A.Lakers | W | 127-124 | 9 |
| 15 | Feb 12 | vs New_York | L | 91-109 | 8 |
| 16 | Feb 3 | at Miami | W | 103-100 | 6 |
| 17 | Feb 2 | vs Portland | L | 121-132 | 11 |
| 18 | Jan 31 | vs Brooklyn | W | 149-146 | 9 |
| 19 | Jan 29 | vs Atlanta | L | 100-116 | 12 |
| 20 | Jan 27 | at New_Orleans | L | 106-124 | 15 |
| 21 | Jan 26 | at Houston | L | 88-107 | 9 |
| 22 | Jan 24 | at San_Antonio | L | 101-121 | 11 |
| 23 | Jan 11 | vs Phoenix | W | 128-107 | 11 |
| 24 | Jan 9 | vs Miami | L | 124-128 | 19 |
| 25 | Jan 8 | at Boston | L | 107-116 | 7 |
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