CJ McCollum has the lowest winning percentage in the playoffs when playing 50+ games, winning 31.6 percent of the time.

lowest playoff win percentage by a player with 50 games played
Interpreted as:
lowest playoff win percentage by a player with 50 or more games played
McCollumBlakeYoungBlaylockAnthonyNajeraStricklandSloanLillardMatthewsMillerCorzineCurryMarinHardawayWeissMcGradyMillerGibsonTurnerWilkinsVanDeWegheChenierPeelerWilliams.316.321.333.333.337.339.346.353.361.365.368.368.373.373.375.377.380.380.380.381.382.382.383.386.386
NAMEGPW%MPGPPGRPGAPGSPGBPGTPGFGMFGAFG%3PM3PA3P%FTMFTAFT%MINPTSREBASTSTLBLKTOVPF+/-
CJ McCollumCJ McCollum57.31635.120.04.22.80.80.41.97.717.543.92.25.838.42.53.277.31,9981,1402381574625108135-165
Steve BlakeSteve Blake53.32120.54.62.02.50.50.11.01.74.239.81.02.538.80.30.470.01,0852421041342565372-176
Thaddeus YoungThaddeus Young51.33329.210.26.11.61.20.41.34.49.446.70.20.826.81.32.161.91,49052231282602066120-199
Mookie BlaylockMookie Blaylock54.33340.014.24.96.62.10.43.05.214.037.02.36.635.01.62.368.32,16176926635711624162102+1
Carmelo AnthonyCarmelo Anthony83.33737.323.16.72.51.20.32.68.119.441.41.23.832.45.76.982.63,0921,91455720410029218298-288
Eduardo NajeraEduardo Najera59.33915.73.83.20.50.50.20.61.43.344.30.10.329.40.81.175.09292231863131934142-48
Rod StricklandRod Strickland52.34630.713.44.07.51.10.22.45.311.944.60.20.728.62.73.870.61,5976992073905611125135-46
Jerry SloanJerry Sloan51.35337.014.08.12.11.40.15.813.542.72.53.767.71,888716412109271187
Damian LillardDamian Lillard61.36140.325.74.56.21.20.33.18.219.941.23.38.836.96.06.888.72,4581,5692753807219191139-235
Wesley MatthewsWesley Matthews52.36531.710.92.91.21.10.31.23.69.139.01.74.933.72.22.681.81,64756815062561663147-258
Andre MillerAndre Miller68.36828.412.63.54.10.90.12.14.810.844.60.30.938.32.63.476.81,928858241280585144151-243
Dave CorzineDave Corzine68.36819.66.34.91.00.30.51.22.65.845.50.00.01.01.570.71,33243033071233779137
Dell CurryDell Curry51.37317.56.71.71.10.80.10.82.56.240.00.82.335.00.91.187.089134087574074181-41
Jack MarinJack Marin51.37332.914.85.52.40.60.15.712.745.03.44.182.41,67975728312091151
Tim HardawayTim Hardaway56.37536.616.83.16.81.60.22.95.914.939.32.06.132.03.14.275.12,052943172382889165122-76
Bob WeissBob Weiss53.37720.87.71.73.10.50.13.27.442.61.41.780.21,10340789164142111
Tracy McGradyTracy McGrady50.38034.522.25.75.01.10.92.77.918.742.61.13.929.05.26.875.71,7241,109286249534713493-155
Brad MillerBrad Miller50.38026.59.56.22.10.60.61.83.57.247.80.10.525.92.43.374.21,327474309107283189172-3
Taj GibsonTaj Gibson71.38022.37.84.90.60.41.00.93.26.151.90.00.00.01.52.170.91,58155334643307262176-96
Evan TurnerEvan Turner63.38123.57.35.02.60.70.31.52.87.437.20.30.935.61.41.876.51,483457317161431993121-234
Gerald WilkinsGerald Wilkins55.38230.712.92.83.50.90.21.75.312.044.20.41.427.81.92.480.21,686711153190521091137-7
Kiki VanDeWegheKiki VanDeWeghe68.38227.816.12.82.00.60.41.36.212.151.00.30.934.53.53.890.71,8901,093188134392789132
Phil ChenierPhil Chenier60.38334.818.13.82.21.20.50.77.316.245.03.54.284.52,0881,08823013159266152
Anthony PeelerAnthony Peeler57.38624.97.03.31.81.10.21.12.67.535.31.03.032.90.80.979.61,417399189102631061117-94
Hot Rod WilliamsHot Rod Williams57.38629.310.96.31.80.81.21.54.08.447.90.00.00.02.83.972.21,669621358100477085180-46