The Boston Celtics have the worst defensive rating by a team in a single NBA playoff run, with a 128.7 rating in 2020-21.

highest drtg by a team in a playoffs
2020-21Celtics1994-95Trail Blazers1991-92Heat1993-94Warriors1986-87Nuggets1984-85Suns2004-05Grizzlies2020-21Grizzlies1996-97Timberwolves1995-96Pistons2020-21Trail Blazers2020-21Nuggets2020-21Jazz1985-86Spurs1988-89Trail Blazers2019-20Mavericks2019-20Nets2015-16Mavericks2020-21Wizards1995-96Suns2020-21Mavericks2005-06Bucks1985-86Bulls2018-19Clippers2008-09Hornets1996-97Clippers1994-95Jazz1992-93Hawks2018-19Pistons128.7127.4126.4125.0124.9124.4124.0124.0123.1122.9122.9122.4122.3122.3122.1122.0122.0122.0121.3121.3121.1121.1121.1121.0120.7120.6120.4120.3120.2
TEAMSEASONGPDRTGMPGPPGRPGAPGSPGBPGTPGFGMFGAFG%3PM3PA3P%FTMFTAFT%MINPTSREBASTSTLBLKTOVPF
Boston CelticsBoston Celtics2020-215128.7240.0112.241.421.06.47.013.038.488.243.512.836.635.022.627.482.51,200561207105323565105
Portland Trail BlazersPortland Trail Blazers1994-953127.4240.0101.736.021.36.03.011.038.380.047.95.314.337.219.731.762.1720305108641893386
Miami HeatMiami Heat1991-923126.4240.099.333.020.07.03.014.736.079.745.25.712.744.721.729.773.072029899602194468
Golden State WarriorsGolden State Warriors1993-943125.0240.0116.038.331.36.08.014.747.090.751.85.014.734.117.024.369.97203481159418244480
Denver NuggetsDenver Nuggets1986-873124.9240.0108.344.726.77.33.714.744.3101.743.61.36.022.218.328.065.57203251348022114488
Phoenix SunsPhoenix Suns1984-853124.4240.0115.737.731.39.34.321.045.390.350.20.34.37.724.731.079.67203471139428136379
Memphis GrizzliesMemphis Grizzlies2004-054124.0240.0102.839.521.05.84.510.841.587.847.37.819.839.212.017.070.69604111588423184398
Memphis GrizzliesMemphis Grizzlies2020-215124.0240.0115.041.222.08.04.010.444.294.446.810.431.632.916.220.479.41,200575206110402052103
Minnesota TimberwolvesMinnesota Timberwolves1996-973123.1240.099.738.724.07.74.09.340.088.745.16.316.738.013.318.074.17202991167223122870
Detroit PistonsDetroit Pistons1995-963122.9240.089.035.714.32.71.713.332.772.045.45.016.730.018.724.775.772026710743854074
Portland Trail BlazersPortland Trail Blazers2020-216122.9248.3119.541.722.85.25.511.842.088.347.516.239.241.319.322.785.31,490717250137313371139
Denver NuggetsDenver Nuggets2020-2110122.4245.0114.843.624.96.14.311.242.192.245.714.738.538.215.920.976.12,4501,1484362496143112204
Utah JazzUtah Jazz2020-2111122.3240.0116.942.419.65.24.113.539.784.247.218.043.641.319.524.380.12,6401,2864662165745148237
San Antonio SpursSan Antonio Spurs1985-863122.3240.092.026.325.09.33.318.038.783.046.60.73.320.014.021.764.6720276797528105478
Portland Trail BlazersPortland Trail Blazers1988-893122.1240.0107.041.327.07.05.313.342.794.045.43.09.731.018.724.775.77203211248121164074
Dallas MavericksDallas Mavericks2019-206122.0244.2117.043.221.56.53.712.742.289.247.313.537.536.019.226.572.31,465702259129392276135
Brooklyn NetsBrooklyn Nets2019-204122.0240.0105.844.325.85.04.514.536.391.339.715.546.033.717.824.572.496042317710320185885
Dallas MavericksDallas Mavericks2015-165122.0240.093.835.020.66.02.411.835.481.243.66.221.429.016.824.269.41,200469175103301259120
Washington WizardsWashington Wizards2020-215121.3240.0110.043.422.44.84.813.440.688.645.87.024.228.921.829.075.21,200550217112242467120
Phoenix SunsPhoenix Suns1995-964121.3240.098.841.521.85.04.311.037.586.043.63.813.028.820.026.376.29603951668720174486
Dallas MavericksDallas Mavericks2020-217121.1240.0106.040.620.75.62.111.039.186.045.513.635.038.814.120.070.71,680742284145391577142
Milwaukee BucksMilwaukee Bucks2005-065121.1240.097.637.021.06.02.413.237.880.247.15.212.441.916.821.478.51,200488185105301266134
Chicago BullsChicago Bulls1985-863121.1256.7113.039.717.08.03.714.742.792.346.20.72.725.027.035.077.17703391195124114492
L.A. ClippersL.A. Clippers2018-196121.0240.0114.740.225.38.03.315.039.889.244.711.531.736.323.528.881.51,440688241152482090150
New Orleans HornetsNew Orleans Hornets2008-095120.7240.084.237.015.86.62.618.427.870.239.66.018.432.622.628.080.71,20042118579331392124
Los Angeles ClippersLos Angeles Clippers1996-973120.6240.092.333.316.36.34.312.032.775.043.66.018.033.321.028.773.37202771004919133687
Utah JazzUtah Jazz1994-955120.4240.0104.036.024.08.03.612.836.475.048.56.213.844.925.034.472.71,200520180120401864135
Atlanta HawksAtlanta Hawks1992-933120.3240.093.338.716.38.03.715.335.783.342.83.312.027.818.726.370.97202801164924114670
Detroit PistonsDetroit Pistons2018-194120.2240.098.042.323.07.34.010.537.596.838.811.033.333.112.016.572.79603921699229164297
Charlotte HornetsCharlotte Hornets1996-973119.9240.095.737.018.36.73.013.336.380.345.26.317.037.316.720.780.6720287111552094063
StatMuse has team, season-level data for defensive rating going back to the 1974 playoffs.