Grenier made his
professional wrestling debut in 1998. While he was in
Florida training and taking part in a modeling shoot, Grenier met WWE
producer Pat Patterson, with whom he became good friends. Patterson invited Grenier to attend WWE events for a few tryout matches under the ring name "Sly Grenier". Following a match, Grenier was offered a contract by WWE, and assigned to WWE developmental territory
Ohio Valley Wrestling. During this period, Grenier made two appearances for WWE, the first at
No Way Out in 2003 as a
referee during the match between
The Rock and
Hulk Hogan in which he helped The Rock to win that match; the other at
WrestleMania XIX during the match between Hogan and
Vince McMahon.
La Résistance (2003–2005) On April 28, Grenier returned to WWE, debuting on the
Raw brand alongside fellow French Canadian
René Duprée. The duo were collectively known as
La Résistance, and were billed as
Frenchmen who were highly critical of American efforts in the
war on terror. Grenier and Duprée made their first appearance on the April 28 episode of
Raw as La Résistance by attacking
Scott Steiner who had recently made remarks comparing France to
hell, offending Grenier and Duprée. La Résistance went on to
feud with Scott Steiner and
Test (who was being forced to be Steiner's tag team partner by
Stacy Keibler) until the
Judgment Day pay-per-view on May 18 where La Résistance defeated Steiner and Test. Grenier and Duprée went on to win the
World Tag Team Championship from
Kane and
Rob Van Dam at
Bad Blood on June 15. After that the decision was made to add
Rob Conway as a third member who began by posing as an American serviceman being abused by Grenier and Duprée until the
Dudley Boyz came out to save him. Once the Dudley Boyz had their backs turned to Conway, he attacked them with the American flag they had given him before tearing it off the pole and laying it on top of them. The trio began carrying the
French flag to ringside and singing the
French national anthem before their matches. During their time together the trio feuded with several tag teams; including the
Dudley Boyz,
The Hurricane and
Rosey, and
Garrison Cade and
Mark Jindrak. They held the titles until
Unforgiven on September 21 when they dropped them to The Dudley Boyz in a three-on-two
handicap tables match. During the match, Grenier suffered neck and back injuries, and was diagnosed with a broken neck a month later. The trio eventually reunited on the edition of March 15, 2004, of
Raw. when Grenier returned. This reunion only lasted a week, as Dupree was drafted to
SmackDown! on March 22, 2004, during the
Draft Lottery. Without Dupree, Grenier and Conway continued to
team together as La Résistance on
Raw. With
American-Franco hostility subsiding, WWE ceased billing the team as being from France and instead promoted them as being haughty
French Canadians who carried the
flag of Quebec to the ring, with Grenier often singing the
Canadian national anthem. Grenier has later said that he preferred teaming with Conway over Duprée, stating "Rob made me love wrestling again". The team held the World Tag Team Championship three times. Their first title reign began when they defeated
Chris Benoit and
Edge on the May 31, 2004, episode of
Raw in Grenier's home town of Montreal. They dropped the championship to them at
Taboo Tuesday on October 19 when Benoit was able to defeat both Grenier and Conway, despite Edge abandoning Benoit during the match. La Résistance re-captured the championship on the November 1 episode of
Raw when Edge walked out on Benoit again. Their final Tag Team Championship win occurred at a Raw
house show in Winnipeg, Manitoba, Canada on January 16, 2005. La Résistance defeated William Regal and Jonathan Coachman (who substituted for Eugene due to suffering an injury). The team split in mid-May 2005 after repeatedly quarreling over which of them was the superior wrestler. Grenier and Conway went into singles competition with announcers claiming that the members of La Résistance were trying to "one up" each other in singles matches without the other man in their corner. This saw Conway defeat a
jobber and
Val Venis, while Grenier was defeated by both Val Venis and
Chris Jericho before both men competed in a triple threat match (with
Intercontinental Champion Shelton Benjamin for the title), Benjamin won the match after the La Résistance members began to argue and fight with each other. The altercation between the two led to a main event match for the edition of June 12, 2005, of
Sunday Night Heat. This match saw Conway portray the
heel, and defeat Grenier.
Singles competition (2005–2006) Grenier was a last minute trade in the
2005 WWE Draft, forcing him to leave Raw and go to
SmackDown! ending his already shakey tag team partnership with Conway. After being traded he was not seen on television for a few months, eventually re-debuting on
SmackDown! on September 1, 2005. He was repackaged with a
gimmick of a
narcissistic male
supermodel known simply as "Sylvain", though his name was later tweaked to "Sylvan", the same spelling that was used in the original La Resistance vignettes. His new gimmick saw him speak with a light French accent, wear sunglasses and use techno music for his entrance. Sylvan soon began a brief feud with
Hardcore Holly, which saw Sylvan determined to protect his "perfect face" at any cost. Sylvan gained a victory over Holly on the October 7 episode of
SmackDown! with help from
Mr. Kennedy. At
No Mercy 2005 after Kennedy defeated Holly, Sylvan came out and continued his feud with him by attacking the injured Holly, which led to Sylvan losing a singles match on an episode of
Velocity and a
hardcore match the following week on
SmackDown!, ending an almost two-month feud. Sylvan entered the
2006 Royal Rumble, but was quickly eliminated by Bobby Lashley. After this, Sylvan slowly reverted to using anti-American tactics while still retaining his model gimmick. However, this change was short-lived and he was soon taken off of television, where he began wrestling in dark matches before
SmackDown! tapings and in OVW. On the June 16, 2006, episode of
SmackDown! vignettes designed to look like vacation promotion videos for
Quebec and starring Sylvan ("the Ambassador at Large for the Beautiful Province of Québec", or "the Ambassador of Québec" for short) began airing. On July 7 he appeared in-ring to cut a
promo attempting to "make peace" with the
US fans by welcoming them to visit his home province. The fans responded with a chorus of boos and a loud "USA" chant. In the coming weeks he continued to appear backstage, telling everyone within earshot how much better Québec was than where ever they were from. He made his ring return with this gimmick on the July 28
SmackDown! with a win over
Tatanka. Sylvan would go on to job against the likes of Tatanka,
Vito, and
Batista under this gimmick. Sylvan's losing streak ended on the first
CW Network episode of
SmackDown! on September 22, 2006, when he defeated Tatanka again by using the ring ropes for illegal leverage. The following week on
SmackDown!, Sylvan defeated
Jimmy Wang Yang, who had insulted Canada the week before. The next week, Sylvan cheated again to take a lead in the feud. The following week, Sylvan finally lost to Yang in a six-man tag team match. After disappearing for a couple of weeks, Sylvan finally returned to cost Yang a match versus Gregory Helms. After that match, Matt Hardy came out to help Yang ward off Helms and Sylvan. The following week, Hardy and Yang defeated Helms and Sylvan, ending Sylvan's feud with Yang.
La Résistance reunion (2006–2007) Sylvan returned to OVW on November 15, making a surprise appearance as Sylvain Grenier, teaming with Rob Conway to reform their La Résistance. The reformed team defeated
Cody Runnels and
Shawn Spears to earn a shot at the
OVW Southern Tag Team Championship, but were unsuccessful in the title match. On the December 22 episode of
SmackDown!, he disguised himself as Santa Claus and attacked World Heavyweight Champion Batista with a steel pipe. This resulted in a match with Batista that Sylvan quickly lost and would end the "Ambassador of Québec" gimmick as Sylvan disappeared from television after this. On the February 20, 2007, episode of
ECW, Grenier returned and reformed the original
La Résistance with René Duprée, defeating a pair of local wrestlers. Due to Duprée getting suspended at the start of March, however, and being sent to rehab after violating the Health and Wellness policy, the team was quietly disbanded. At the August 7, 2007, taping of
SmackDown!, Sylvan made his televised return under his old model gimmick in a match against
Kane, which he lost. This would turn out to be Grenier's final match for WWE, as he was released from his contract on August 13.
Total Nonstop Action Wrestling (2007–2009) On November 29, 2007, Grenier debuted as a
French language commentator for
Total Nonstop Action Wrestling's (TNA)
Impact! television show on
Réseau des sports (RDS). During his time with TNA, he embarked on a feud with former commentator
Pierre Carl Ouellet, with Grenier claiming that he was the better commentator. They settled their feud in a match in
Hawkesbury, Ontario, on June 21, 2008, in which Ouellet was victorious. Greiner was released in 2009.
Independent circuit (2008–2018; 2018–2019) Grenier returned to the independent circuit in January 2008 at International Wrestling Syndicate's Praise The Violence where he lost to
Kevin Steen in an IWS Heavyweight Championship number one contendership match. On August 30, 2008, Grenier reunited with
Rob Conway to reform
La Résistance, and they defeated Karl Briscoe and Jay Phenomenon to win
Northern Championship Wrestling's Tag Team Championship. He was fired during the year, along with many other wrestlers and producers as a cost-cutting measure due to
COVID-19.
Return to independent circuit (2022–present) Sylvain along with Rob Conway were recently FWE Tag Team Champions. FWE is based in Raleigh NC. He held the FWE Heavyweight Championship until March of 2025. ==Personal life==