Did any members of the original team have cameos in the movie Hoosiers?

Yes. 1954 Milan Indian Guard, Ray Craft, has two cameos in the movie. He is the person who greets the Hickory Huskers when they arrive at the state finals. He is also the person who tells Coach Dale (Gene Hackman) before the state final, that it is time for his team to take the court. In real life, Ray grew up to become the assistant commissioner of the Indiana High School Athletic Association.