Thomas Loebb won three bronze medals with the West German water polo team in international tournaments. He won them at the 1982 World Championships, 1984 Los Angeles Olympics, and 1985 European Championships. He was also a gold medal-winner with them at the 1981 European Championships and 1985 World Cup. Nationally, Loebb played with ASC Duisburg until 1977, and then moved to Wasserfreunde Spandau 04 in Berlin until 1987. In 1982, 1985 and 1986 he helped Spandau to win the European Champions Cup. He also won nine national titles with Spandau.
Loebb then studied sports but due to an injury could not graduate. He then moved to Axel Springer Academy to study journalism. From 1988 he worked with the German newspaper BILD Zeitung and then became sports editor at Berliner Kurier.