Simon Gagne comes from a hockey family. His grandfather was a minor league player with the Cleveland Barons in the 1940's and his father attended the Quebec Aces training camp in 1967. Simon himself was the most successful in this hockey bloodline, though. He was an NHL regular just a year after being drafted by the Philadelphia Flyers in 1998. The skilled, speedy forward posted huge numbers during his final year of Junior, then stepped right into the Flyers lineup and posted 20 goals without a day spent in the minor leagues.
Gagne not only managed 48 points as a rookie, but he continued to score in the post season by adding five goals and 10 points during 17 playoffs games. He was named to the NHL's All-Rookie Team for his efforts. The young center blossomed into a bonafide star during his second season with the Flyers when he scored 27 goals and 59 points in just 69 games. He continued the hot start to his career in 2001-02, but his greatest accomplishment occurred away from the NHL.
Gagne, who posted 33 goals and 66 points for the Flyers was one of the young players selected to the primarily veteran-laden Canadian Olympic roster for the 2002 Winter Olympic Games in Salt Lake City. Gagne chipped in a goal and three assists in six games en route to capturing the Gold Medal for Canada.
Prior to the 2001-02 campaign his Junior club, the Quebec Remparts, retired his #12 jersey.
Looking to build on a career year in 2001-02, Gagne was plagued by injuries throughout the 2002-03 before rebounding in 2003-04. In his fifth season with the Flyers, Gagne went on to register 45 points (24-21-45) while surpassing the 200 point plateau for his career. Although Gagne and Flyer teammates fell short in their attempt to reach the Stanley Cup final for the first time since the 1996-97 season, losing in the Eastern Conference Final to the eventual Cup champions from Tampa Bay.
Over the next pair seasons in Philadelphia, Gagne would lead the Flyers in goals scored and tally a whopping 147 points. After a re-building year for the Flyers in 2006-07, Gagne and a competitive Flyer squad returned in 2007-08. However after a suffering a string of concussions early into the year, Gagne was ordered to stay off the ice and he missed the final 27 games of the regular season and did not appear in a single playoff game.
On the international stage, Gagne was instrumental in leading Team Canada to the 2004 World Cup of Hockey title and helped Canada capture the silver medal at the 2005 World Championship. Gagne was also a member of Team Canada in the 2006 Winter Olympics.
After missing much of the 2007-08 season due to concussion issues, Gagne returned to the Flyers lineup with a vengeance in 2008-09, scoring 34 goals and adding 40 assists while appearing in 79 games. The following season Gagne's injury woes would return. Early into the 2009-10 season Gagne would undergo surgery to repair two hernias in his right groin. He would once again return to the Flyers lineup after missing 24 games.
The Philadelphia Flyers were unquestionably the most surprising story of the 2010 NHL playoffs and it was Gagne who played a key role in the leading the club to the Stanley Cup Final. In the second round of the playoffs the Flyers found themselves trailing the Boston Bruins three games to none and it was Gagne who scored the overtime game winning-goal in game four, added two goals in game five and scored the winner in game seven to complete the improbable comeback. The Flyers became only the third team in NHL history to erase a three games to none deficit.
In the summer of 2010, the career Flyer was on the move for the first time in his NHL career. With the club feeling the strain of the salary cap, they shipped Gagne to the Tampa Bay Lightning in exchange for Matt Walker and a fourth round draft pick.
After just one season in Tampa, in which he recorded 17 goals and 40 points, Gange was on the move again. This time, as an unrestricted free agent, he inked a deal with the Los Angeles Kings.
In 2011-12, though battling through injury, Gagne was part of the Los Angeles Kings club that stormed through the Western Conference playoffs and defeated the New Jersey Devils to capture the first Stanley Cup in franchise history.
Gagne appeared in just 11 games for the Kings during the lockout-shortened 2012-13 season before being traded back to Philadelphia on February 26, 2013 for a conditional fourth round draft pick.