Los Angeles Kings

King was drafted 109th overall in the 2007 NHL Entry Draft by the Los Angeles Kings. He spent five seasons with the Lethbridge Hurricanes (spanning from 2004–05 to 2008–09) in the Western Hockey League (WHL).

King made his professional debut during the 2009–10 season, playing 20 games in the ECHL with the Ontario Reign, and the remainder of the regular season and playoffs with the Kings' American Hockey League (AHL) affiliate, the Manchester Monarchs.

King remained with Manchester for the beginning of the 2010–11 AHL season before being recalled to the NHL by Los Angeles on November 16, 2010 to replace the injured Alexei Ponikarovsky on their active roster. On November 17, 2010 he played in his first NHL game when he suited up with the Kings for a home game against the Columbus Blue Jackets.

On February 12, 2012, King scored his first career National Hockey League goal against the Dallas Stars. He went on to score five goals with three assists in 20 games during the 2012 Stanley Cup playoffs as the Kings won their first ever Stanley Cup championship.

On October 24, 2013, King completed his first ever National Hockey League hat trick against the Phoenix Coyotes. King won his second Stanley Cup when the Kings defeated the New York Rangers on June 13, 2014. Appearing in 26 games during the 2014 Stanley Cup Playoffs, King scored three goals and eight assists.

On July 30, 2014, King and the Los Angeles Kings avoided arbitration by agreeing to a three-year contract worth $5.95 million. He scored 13 goals to go with 13 assists for the Kings during the 2014–15 NHL Season. His production would soon decline in subsequent seasons, scoring 7 goals in 2015–16, and 8 in 2016–17.

International

Year	Team	Event	Result		GP	G	A	Pts	PIM
2005	Canada Western	U17			6	0	0	0	0
2006	Canada Western	U17	7th		5	0	5	5	6
2006	Canada	IH18			4	0	0	0	0
Junior totals					15	0	5	5	6