Why Does Alabama Have A Number On Their Helmet Why Does The Alabama Football Team Use The Number 12 Helmet As Their Logo?

Why does the Alabama football team use the number 12 helmet as their logo? - why does alabama have a number on their helmet

For example, if you were "football helmet of Alabama" in Google Images, Hull No. 12 introduced in about 90% of the images. Is it because Joe Namath had 12 in Alabama?
(I do not ask why they numbers on their helmets, I understand that is why the 12 most commonly used?)