Answered November 10th, 2017

Andre Drummond became the first Piston with at least 15p/20r/5a in a game since Dennis Rodman in 1992.

Who was the last Pistons player with at least 15 points, 20 rebounds and 5 assists in a game?
Interpreted as:
Who was the last Pistons player with at least 15 points, 20 rebounds and 5 assists in a regular season game?