Cyr graduated from Edouard Montpetit High School in Montreal and attended Seminole State College in Oklahoma.

[citation needed] Cyr made his professional debut in 1999, splitting time between the Azl Padres and the Idaho Falls Chukars of the rookie leagues.

[citation needed] He made his Major League Baseball debut for the Padres on June 23, 2002, against the New York Yankees, working one scoreless inning in relief.

He departed the Uni-President Lions in September 2006, leaving a record of 9 wins (including 2 shutouts), 5 losses, and an ERA of 2.52, a WHIP of 1.23 in his 128.2 innings during the 2006 CPBL season.

After a stint pitching with Quebec of the Canadian American Baseball league, where he was named player of the week ending on May 25, 2008, he was again picked up by the Dodgers and assigned to the Inland Empire 66ers of San Bernardino and later promoted to the Las Vegas 51s.

[citation needed] In April 2001, Cyr turned himself into the Federal Bureau of Investigation and was charged with having had sex with a 15-year-old girl while on a Qantas flight from Australia to Los Angeles that January.