Michael Thomas Dorreen (born 19 January 1967) is a New Zealand former professional rugby league footballer who played in the 1980s and 1990s.
Dorreen played for the dominating Canterbury provincial side of the early 1990s alongside Quentin Pongia, Logan Edwards, Whetu Taewa and coach Frank Endacott.
In 1994, he changed regions and joined the Hawkes Bay Unicorns for the inaugural Lion Red Cup.
[citation needed] In 1995, he joined the new Auckland Warriors franchise in the Australian Rugby League.
In 2007, he was to coach the Canterbury under-18 side with his former teammate Logan Edwards before the competition was cancelled by the New Zealand Rugby League.