Williams was awarded the Conn Smythe Trophy as the playoff MVP in 2014 after scoring nine goals and finishing with 25 points in 26 postseason games. He is a career 7–0 in Game 7s, and his 14 Game 7 points are an NHL record.
"Justin is a proven winner and we feel he will be a great addition to our club," Capitals general manager Brian MacLellan said. "We felt it was important for our team to add someone of his caliber, as a hockey player and as a veteran leader."
Williams had 41 points (18 goals, 23 assists) in 81 games with the Kings last season, as Los Angeles missed the playoffs after five straight postseason appearances.
He has 227 goals and 355 assists in 14 seasons with the Philadelphia Flyers, Hurricanes and Kings.
- Scooby Axson