Harris was mentored by Bob Weems, who was the long time renowned voice of Monmouth Park in Oceanport, New Jersey and Turf Paradise in Phoenix, Arizona.
Tom Harris also served as Public Address Announcer for The Chicago Cubs[6] games during Spring Training at Hohokam Stadium in Mesa, Arizona from 1981 to 1989.
In the early 1990s while announcing horse races at the Yakima Meadows season, he worked a double by serving as Public Address Announcer and later Play by Play Broadcaster for The Yakima Sun Kings of the Continental Basketball Association (CBA); a league that featured the tail end of careers of players like Darryl Dawkins, Manute Bol, Jo Jo English and others.
The story was so remarkable that it was co-featured by sportswriter Tim Price on the front page of the sports section of the San Antonio Express News that year.
Harris also served as General Manager & Vice President of Racing Operations at Atokad Downs Track in South Sioux City, Nebraska from 2001 through 2003.