I've heard it in interviews from others and from Bench himself.

BTW, Bench contributed to a new photographic book intertwining the history of baseball and Route 66:

snip

Just as baseball is at the heart of America, so too is Route 66. This book is a photographic tribute to the national pastime along the artery that stretches from the shores of Lake Michigan, close to where the Cubs play, to the Pacific Ocean at Santa Monica, where baseball memories and players abound. Among the players who will guide readers on the journey will be baseball greats George Brett, Billy Hatcher, Alex Bregman, and Ryan Howard. Leading off will be Johnny Bench of Binger, Oklahoma, and cleaning up will be Jim Thome of Peoria, Illinois.

In Grassroots Baseball: Route 66, photographer Jean Fruth weaves more than 250 full-color images of the national pastime along the historic highway into a tapestry that reminds us of the heart and soul of America.

https://www.skyhorsepublishing.com/9781683584506/grassroots-baseball/