Answered May 19th, 2019

Giannis Antetokounmpo had 23 boards in Game 3 tied for the most in a road game in the Eastern Conference Finals since Elvin Hayes in 1979.

Who was the last player with 23 rebounds in an eastern conference finals game on the road?
Interpreted as:
Who was the last player with 23 or more rebounds in an eastern conference finals game on the road?