Mark Robert Riddell (born 9 December 1980) is an Australian rugby league commentator and former professional player who played as a hooker in the 2000s and 2010s.

Riddell eventually made the transition into first grade while playing with his new club side at St George, making his début against local rivals the Cronulla-Sutherland Sharks during round one of the 2001 season.

During his second season with St. George Illawarra, Riddell would again have a good season not only impressing club staff and fans with his quickly evolving running game from dummy half, goal kicking and strength close to the try line ultimately earning himself a call up to the 2002 international Australian Kangaroos 'train-on' squad but was not selected in the final touring side.

[2] At the start of the 2003 NRL season, Riddell was criticised amongst some media circles for being slow, out of shape and overweight along with negative talk about discipline problems, however nothing eventuated and he went on to play all twenty-four games of the regular season again finishing as the club's top point scorer with an individual record high of 166 points.

Salary cap restraints on the club at the conclusion of the season along with several lucrative offers eventuated in a move from the Dragons.

[26] After his release from Wigan in 2010, Riddell made his return to NRL for the 2011 season, this time with the Sydney Roosters, the club he had represented at a junior level in the SG Ball and Presidents Cup competitions.

Linking to the Roosters ensured Riddell would reunite with Brian Smith, whom he played under at the Eels for one and a half seasons.

[citation needed] In 2012, Riddell was simultaneously coach of the Australian women's team and the Sydney Roosters SG Ball Cup side.