Mark Geyer, Australian rugby league player and sportscaster
Mark Geyer OAM (born 7 December 1967), is an Australian former professional rugby league footballer who played in the 1980s, 1990s and early 2000s. An Australian international and New South Wales State of Origin representative second-rower, he is a rugby league media identity. Geyer's club career was played primarily with Penrith, with whom he won a premiership in 1991, as well as the Balmain Tigers and the Western Reds. He is also the brother of fellow former professional rugby league footballer Matt Geyer.

Geyer was part of the Triple M on-air team for the Sydney breakfast show called The Grill Team from 2009 to 2017 before moving to an evening slot—The Rush Hour—on the same station. On the 24th of October the eve of the 2020 NRL grand final he was seen at the Penrith Leagues club.