These shirts are quite vintage but they were in remarkably good shape. Most of the sorority shirts I come across nowadays are t shirts that commemorate a formal or mixer. I haven't seen a football jersey letter shirt in years except of course on this circa 1980s shirt quilt. :) Of course fraternity little sisters are not allowed anymore either.
The athletic teams at this university are known as the Bradley Braves. The recipient was able to find a tiny applique patch of the original mascot. The Native American mascot was ultimately considered offensive and is no longer in use. They currently use the same team name but the mascot is a gargoyle.