"We felt at this stage of the franchise it was time to make a significant move for an impact player," Kings GM Dean Lombardi said in a statement. "Mike Richards is not only one of the top players in the league, he's also universally recognized as one of the finer leaders in the game and one of its elite competitors. Additionally, given that he's only 26 years old and he's on a long-term contract, he fits our plan now and for the long-term future."
Richards has nine more years on his contract, with a $5.75 million cap hit.
The center, a first-round draft pick of the Flyers in 2003, had 66 points (23 goals, 43 assists) in 81 regular-season games last season. In 453 career games, he has 133 goals and 216 assists.
This group can expect to play together for quite some time.
Kopitar signed a seven-year contract extension in October 2008, and Brown agreed to a six-year extension a year earlier. Defenseman Matt Greene is in the midst of a five-year deal; forward Justin Williams inked a four-year extension in February; fellow forward Jarret Stoll is playing under a four-year extension; and defenseman Rob Scuderi left the Pittsburgh Penguins to join the Kings in 2009 when he signed a four-year deal.
Simmonds had 14 goals and 16 assists in 80 games with the Kings last season, his third in the NHL. He was chosen by Los Angeles in the second round, the 61st pick overall, in the 2007 draft. He had 39 goals, 93 points and 264 penalty minutes in 240 regular-season games and played in all 12 Kings playoff games the past two years.
Schenn, the younger brother of Toronto Maple Leafs defenseman Luke Schenn, provides an even bigger upside. After being taken with the No. 5 overall pick in the 2009 draft, he has gotten a small taste of the NHL. Schenn played in one game during the 2009-10 season and eight more last season, notching a total of two assists.
"We view (Schenn) as one of the top young players not playing in the league," Flyers GM Paul Holmgren said in a conference call Thursday. "He's had a little bit of a taste with Los Angeles over the last two years, and he went to the (AHL) last year and played some games at the end of the season. We'll see how it goes. He's going to come to our development camp in early July and obviously will be at training camp. I can easily say we think he's capable of doing it, but as with any young player, you never know until you get to that point. So he's going to be given every opportunity to make our team, for sure."
Earlier Thursday, the Flyers sent center Jeff Carter to the Columbus Blue Jackets in exchange for forward Jakub Voracek, the eighth overall pick in Friday's NHL draft and a third-round draft pick. They also signed goalie Ilya Bryzgalov to a nine-year deal worth $51 million, a source told ESPN.com.
Flyers coach Peter Laviolette refuted talk he had a falling out with Richards. He called it tough to lose the stalwarts.
"Jeff and Mike were terrific players for our organization. They're elite players in our league," he said. "We went and replaced them and went in a different direction with a goaltender and wingers up front, different pieces.
"Paul said it best: It should be a good team, but it's a different team," he said.
Pierre LeBrun covers the NHL for ESPN.com. Information from The Associated Press was used in this report.