I am not sure which track you were at but the warmup track near the book store ( not the main stadium) has a plaque of all the people who attended Stanford and were on the Olympic team. Charlie’s name is on it for 1972 but they have his name listed as Chuck Francis. He hated that nick name.
The last time we were there I took a picture of Charlie holding James next to it. It was at this time Charlie and James were having 100 meter contests as well. I think James would have been 3 or 4 at the time.