Karl Malone had the most points per game by a player in the playoffs in his 18th playoff, with 19.6 per game.

who has the highest points per game in their 18th playoff
MaloneStocktonAbdul-JabbarDuncan19.612.511.15.9
NAMEGPPPGMPGRPGAPGSPGBPGTPGFGMFGAFG%3PM3PA3P%FTMFTAFT%MINPTSREBASTSTLBLKTOVPF+/-
Karl MaloneKarl Malone519.638.26.84.01.60.44.06.816.840.50.00.20.06.08.273.2191983420822015-31
John StocktonJohn Stockton412.535.34.010.02.80.32.04.510.045.00.51.828.63.03.392.3141501640111816+9
Kareem Abdul-JabbarKareem Abdul-Jabbar1511.123.43.91.30.30.71.54.59.846.30.00.02.12.972.135116759195112243
Tim DuncanTim Duncan105.921.84.81.40.21.31.02.25.242.30.00.01.52.171.42185948142131018+68