Seems “The Beaver” spent some time in the military as well. In fact, he started early, joining the United States Air Force Reserve while still attending high school in 1966. Yet, he was already a star in his own right. He could be seen in 1967 in full dress uniform giving an award to Gene Kelly alongside child star Angela Cartwright. And even though there were rumors of him being killed in action during the Vietnam War, Mathers never left the states during his years of service. He had an acting career to pursue!