7 to advance to the Eastern Conference Finals. The Flyers became the third team in NHL history to come back from a three games to none deficit in a series and win. Tampa Bay Lightning On July 19, 2010, Gagné was traded to the Tampa Bay Lightning in exchange for Matt Walker and a fourth-round pick in the 2011 NHL Entry Draft. He recorded 17 goals with 23 assists for the Lightning that year, to go with another five goals in the 2011 playoffs. Los Angeles Kings After just one season in Tampa Bay, Gagné became an unrestricted free agent. On July 2, 2011, he signed a two-year, $7 million contract with the Los Angeles Kings. He scored his first goal as a Kings player on October 13, 2011, against Martin Brodeur of the New Jersey Devils. During the regular season, he appeared in 34 games and scored 10 goals with 17 points overall. On June 11, 2012, he won the Stanley Cup over the Devils, along with former Flyers teammates Jeff Carter and Mike Richards. During the Kings' playoff run, he appeared in four games but did not record a point. During the off-season, he underwent surgery to remove a 5 cm mass from his neck which had been causing him chronic pain. Return to Philadelphia In the following 2012–13 lockout-shortened season, Gagné sparingly appeared in 11 games with the Kings before on February 26, 2013, he was traded back to Philadelphia in exchange for a conditional fourth-round draft pick. He appeared in his return to Philadelphia the following night at the Wells Fargo Center, February 27, 2013, against the Washington Capitals. In his first game back, Gagné registered his first goal of the season on a power play, assisted by Brayden Schenn and Daniel Brière, ending a 32-game goalless streak, the longest of his professional career. Boston Bruins After a year hiatus from professional hockey, Gagné signed a professional try-out contract with the Boston Bruins. After a successful training camp, Gagné was signed to a one-year contract with them on October 14, 2014. After scoring 3 goals in 23 games, it was announced on January 12, 2015, that Gagné would not return to the Bruins in the 2014–15 season after his father's death in December 2014. In a possible signal of the end of his professional career, Gagné's contract was terminated by the Bruins on January 29, 2015.