Great thoughts Michael. Xavier was using the athletic X within a shield for several years. When it came time for a rebrand the marketing office decided to go ahead and use the athletic X. It seems to be working since Xavier is the only school with the X and it really stands out as logo.
Here was our old brand updating to our most recent — https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcS_6V403aRf09gD0xejWdoysbj65jqEZXV5Fpek0hxGK7uZBrtNpw
Now here is our newest brand which rolled out this summer — http://www.xavier.edu/brand/2016-assets/Xavier-logo-horz-color-400-110.jpg