Answered April 22nd, 2019

Reggie Jackson earns his "Mr. October" nickname by hitting three home runs on three consecutive pitches, becoming the first player with 3 homers in a World Series game since fellow Yankees slugger Babe Ruth in 1928.

Who was the last Yankees player with 3 HR in a World Series game?
Interpreted as:
Who was the last Yankees player with 3 or more HR in a World Series game?