The outstanding right tackle for the New York Jets decided to skip locker rooms during the summer of 2015. He took his hefty talents to the blue side of East Rutherford and joined the New York Giants, later helping them to not one, but two Super Bowl championships.
This is why McKenzie started this trend. Of course, there were other before him, that changed locker rooms while maintaining the same home address, but he did it in a way that led to gold for one side.