Mark Bradley Geyer OAM[3] (/ɡaɪər/) (born 7 December 1967) is an Australian radio host and former professional rugby league footballer who played in the 1980s, 1990s and 2000.

In 1987, Geyer established a regular first-grade place with the Penrith Panthers and was selected for the City Seconds team after only a handful of top grade appearances.

He also played in Penrith's 1987 Reserve Grade Grand Final winning team that defeated the Manly-Warringah Sea Eagles 11–0 at the Sydney Cricket Ground.

Geyer was first selected in the second row for New South Wales in game 3 of the 1989 State of Origin series, at Lang Park in Brisbane.

His 1990 season was largely lost to a succession of injuries [citation needed] that restricted him to just 12 games, though he did play in Penrith's maiden Grand Final appearance (an 18–14 loss to the Canberra Raiders) and from there was selected, along with Panthers teammates Greg Alexander, John Cartwright and Brad Fittler, for the 1990 Kangaroo tour.

Geyer had a hand in all three of the Panthers tries on the day and was judged to be their best player, though his sin-binning for dissent by referee Bill Harrigan during the second half was thought to have cost him the Clive Churchill Medal as man of the match.

He said a large part of the drug usage was to simply trying to numb the pain of losing his best mate, former Penrith player Ben Alexander, who was killed in a car accident in 1992.

He received an Order of Australia medal for "service to the sport of Rugby League football, and to the community through a range of charitable organisations."

Geyer then suggested that the NRL introduce a controversial KPI target system where Sydney clubs were measured on sponsorship dollars, average crowd figures, on-field success and their dedication to junior and grassroots rugby league.

Geyer went on to explain about the KPI system saying "I don’t know how they would do it, there’s brainier guys than me at the moment, people who get paid to do this, but after five years, the club with the lowest points, guess what, they move to the Central Coast".