The Indiana Pacers had the best defensive rating by a team in 2012-13, with a 99.8 rating.

team best defensive rating 2012-2013
2012-13Pacers2012-13Grizzlies2012-13Spurs2012-13Thunder2012-13Wizards2012-13Bulls2012-13Celtics2012-13Clippers2012-13Heat2012-13Hawks2012-13Nuggets2012-13Bucks2012-13Timberwolves2012-13Warriors2012-1376ers2012-13Rockets2012-13Nets2012-13Knicks2012-13Mavericks2012-13Lakers2012-13Jazz2012-13Raptors2012-13Suns2012-13Pistons2012-13Magic2012-13Trail Blazers2012-13Cavaliers2012-13Hornets2012-13Kings2012-13Bobcats99.8100.3101.6102.6103.0103.2103.3103.6103.7104.4105.1105.2105.4105.5105.7106.1106.2106.3106.5106.6106.8107.5108.1108.1109.1109.2109.4110.1111.4111.5
TEAMSEASONGPDRTGMPGPPGRPGAPGSPGBPGTPGFGMFGAFG%3PM3PA3P%FTMFTAFT%MINPTSREBASTSTLBLKTOVPF
Indiana PacersIndiana Pacers2012-138199.8241.994.745.920.37.26.315.135.180.643.66.919.734.717.623.674.619,5907,6743,7141,6455805131,2271,623
Memphis GrizzliesMemphis Grizzlies2012-1382100.3241.593.442.720.98.65.314.036.181.544.44.713.534.516.521.377.319,8057,6593,5041,7157034361,1441,660
San Antonio SpursSan Antonio Spurs2012-1382101.6242.4103.041.325.18.55.414.739.181.448.18.121.537.616.621.079.119,8808,4483,3872,0586954461,2061,427
Oklahoma City ThunderOklahoma City Thunder2012-1382102.6241.8105.743.621.48.37.615.338.179.348.17.319.437.722.226.882.819,8308,6693,5791,7536796241,2531,654
Washington WizardsWashington Wizards2012-1382103.0242.193.243.221.67.34.615.135.581.643.56.618.236.515.621.373.319,8557,6443,5391,7755983761,2381,681
Chicago BullsChicago Bulls2012-1382103.2241.893.243.223.07.25.114.335.781.743.75.415.435.316.421.277.319,8307,6413,5401,8865884171,1711,617
Boston CelticsBoston Celtics2012-1381103.3244.996.539.322.88.24.514.637.079.746.56.117.235.816.321.077.619,8407,8183,1871,8436673651,1811,717
Los Angeles ClippersLos Angeles Clippers2012-1382103.6240.6101.141.623.99.65.614.638.580.647.87.621.435.816.423.071.119,7308,2893,4131,9587844611,1971,716
Miami HeatMiami Heat2012-1382103.7242.4102.938.623.08.75.413.938.477.449.68.722.139.617.423.075.419,8808,4363,1661,8907104411,1431,533
Atlanta HawksAtlanta Hawks2012-1382104.4242.198.040.924.58.14.514.937.681.046.48.623.237.114.119.771.519,8558,0323,3512,0076643691,2191,473
Denver NuggetsDenver Nuggets2012-1382105.1242.7106.145.024.49.36.515.340.785.247.86.418.534.318.426.270.119,9058,7043,6932,0027625331,2531,682
Milwaukee BucksMilwaukee Bucks2012-1382105.2241.898.944.022.98.46.714.138.187.843.57.320.436.015.320.773.619,8308,1083,6051,8766855501,1561,554
Minnesota TimberwolvesMinnesota Timberwolves2012-1382105.4240.695.742.022.48.54.714.835.981.743.95.518.030.518.524.974.219,7307,8513,4461,8367003871,2141,509
Golden State WarriorsGolden State Warriors2012-1382105.5241.5101.245.022.56.94.215.138.283.445.88.019.940.316.821.379.019,8058,2963,6861,8455673461,2361,753
Philadelphia 76ersPhiladelphia 76ers2012-1382105.7240.993.241.322.87.44.713.037.384.144.46.317.536.012.216.872.919,7557,6403,3891,8676093841,0701,505
Houston RocketsHouston Rockets2012-1382106.1241.2106.043.423.28.34.416.438.182.746.110.628.936.619.225.575.419,7808,6883,5611,9026793591,3481,662
Brooklyn NetsBrooklyn Nets2012-1382106.2242.196.942.820.37.34.814.735.979.845.07.721.535.717.523.973.119,8557,9443,5071,6685993911,2061,500
New York KnicksNew York Knicks2012-1382106.3240.6100.040.619.38.23.612.036.581.644.810.928.937.616.021.175.919,7308,1963,3261,5796722949881,650
Dallas MavericksDallas Mavericks2012-1382106.5243.7101.141.923.27.95.514.038.884.046.27.419.937.216.120.479.319,9808,2933,4371,9066484541,1441,698
Los Angeles LakersLos Angeles Lakers2012-1382106.6240.9102.244.822.27.05.215.037.181.045.88.724.635.519.327.969.219,7558,3813,6741,8185764291,2321,467
Utah JazzUtah Jazz2012-1382106.8242.498.042.022.78.46.314.837.181.845.46.216.936.617.523.076.419,8808,0383,4461,8596905151,2101,750
Toronto RaptorsToronto Raptors2012-1382107.5243.797.240.221.57.34.813.736.381.544.67.020.334.317.622.378.819,9807,9713,2971,7655953921,1241,836
Phoenix SunsPhoenix Suns2012-1382108.1241.595.241.622.68.05.315.637.384.444.35.917.733.014.719.774.419,8057,8053,4131,8556594341,2781,688
Detroit PistonsDetroit Pistons2012-1382108.1241.594.942.121.27.04.915.136.381.044.96.317.635.615.922.869.919,8057,7783,4541,7425744001,2411,623
Orlando MagicOrlando Magic2012-1382109.1241.294.142.722.86.44.414.537.784.244.86.218.732.912.516.675.519,7807,7183,5021,8715283581,1911,591
Portland Trail BlazersPortland Trail Blazers2012-1382109.2242.197.540.821.86.64.314.736.781.944.88.223.235.315.920.577.619,8557,9953,3481,7845383531,2031,518
Cleveland CavaliersCleveland Cavaliers2012-1382109.4240.696.541.020.77.94.114.036.584.243.46.719.334.616.822.375.619,7307,9133,3631,6946473341,1491,737
New Orleans HornetsNew Orleans Hornets2012-1382110.1241.294.141.621.06.35.414.536.080.444.86.518.036.315.520.077.619,7807,7143,4141,7215204401,1931,673
Sacramento KingsSacramento Kings2012-1382111.4241.8100.240.620.88.24.214.637.684.244.77.420.536.317.522.876.919,8308,2193,3281,7086713421,1991,717
Charlotte BobcatsCharlotte Bobcats2012-1382111.5241.593.440.319.47.25.814.134.481.142.55.717.133.518.925.175.019,8057,6613,3061,5875914791,1531,561
StatMuse has team, season-level data for defensive rating going back to the 1973-74 season.