Answered May 12th, 2019

Joel Embiid is the first 76ers player to average at least 20 PPG and 10 RPG in a postseason with at least 10 games played since Charles Barkley in 1989-90.

Who was the last 76ers player with 20 PPG and 10 RPG in a postseason with at least 10 games?
Interpreted as:
Who was the last 76ers player with 20 or higher PPG and 10 or higher RPG in a postseason with at least 10 games?