Tom Marr began his career in radio at WWDC AM in Washington D.C. doing a high school sports show. Tom graduated from Montgomery Blair High School in Silver Spring, Maryland and joined the U.S.Marine Corps. When his service obligation ended Tom began working in radio full time.

His early years as a newsman found Tom working at Radio and TV stations in Rhode Island, Connecticut, and Virginia. In the spring of 1967, he joined the award winning news team of WFBR Radio in Baltimore and remained at the station for more than two decades. In addition to his on air duties as a news anchor and reporter, Tom did extensive work for CBS Radio Sports covering the Baltimore Orioles, Colts, and Bullets during the late 60's and early 70's. In 1979, Tom became part of the Baltimore Oriole radio play-by-play team and stayed in that position until l986. After the 86 season, the Orioles sold their radio rights to another station and Tom remained at WFBR and began a successful career as a talk-show host.

Tom and a number of his fellow hosts joined WCBM Radio in 1988 when WFBR was sold and changed to a music format. Tom remained at WCBM until 1996. He joined the talk line up at WWDB in Philadelphia before returning two years later signing an unprecedented 10 year contract with WCBM.

In 2002-2003, Tom hosted an evening show on the legendary WOR 710 AM and syndicated on the WOR Radio Network.

During his years as a radio newsman, Tom broke many stories including a number that had national significance. Tom has taken his talk show on the road to Israel, The Republic of China, Ireland, Glasgow, Edinburg, Bosnia. In July 2006, he spent three weeks in Iraq, Kuwait and Qatar with Colition Forces. He has also practiced his craft with assignments to Great Britain, Germany, Belgium, South Africa and Taiwan.

Tom has been named one of the top 100 talk show hosts in America for the 5 straight years by Talkers Magazine. He is also serves as fill-in host for Mark Levin's syndicated radio show.

Tom and his wife Sharon live in Baltimore County, Maryland and maintain a residence in Lee County, Florida. Tom now has studio facilities at both locations. Tom and Sharon, a retired Baltimore City Police detective, have five children and 10 grandchildren.