Mark Bradley Geyer is an Australian radio host and former professional rugby league footballer who played in the 1980s, 1990s and 2000. 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 the brother of fellow former professional rugby league footballer Matt Geyer.

The Penrith Panthers are an Australian professional rugby league football club based in the Greater Western Sydney suburb of Penrith that competes in the National Rugby League (NRL). The team is based 55 km (34 mi) west of the centre of Sydney, at the foot of the Blue Mountains. Penrith are the current reigning NRL Premiers, having won the title five times, including the last three times consecutively.