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Los Angeles Kings (1988–1996)

The Kings named Gretzky their alternate captain. He made an immediate impact on the ice, scoring on his first shot on goal in the first regular season game. The Kings got off to their best start ever, winning four straight en route to qualifying for the playoffs. For only the second time in his NHL career, Gretzky finished second in scoring, but narrowly edged the Pittsburgh Penguins ' Mario Lemieux (who scored 199 points) for the Hart Trophy as MVP.

Despite being underdogs against the defending Stanley Cup champion Edmonton Oilers in the Smythe Division semifinals, Gretzky led the Kings to a shocking upset of his old squad, spearheading the Kings' return from a 3–1 series deficit to win the series 4–3. He was nervous Edmonton would greet him with boos, but they were eagerly waiting for him. The Kings were then swept by the Calgary Flames, who went on to win their first Stanley Cup.

In 1990, the Associated Press named Gretzky Male Athlete of the Decade. For the second year in a row, the Kings eliminated the defending champions in the first round when they defeated the Flames in six games, but also for the second year in a row their season ended in a second round sweep, this time at the hands of Gretzky's former team. The Oilers went on to win their fifth Cup (and first without Gretzky). In his post-championship interview, Messier (who had replaced Gretzky as Edmonton's captain following the trade) dedicated the Oilers' Cup win to him.

Gretzky's first season in Los Angeles saw a marked increase in attendance and fan interest in a city not previously known for following hockey. The Kings now boasted of numerous sellouts. Many credit Gretzky's arrival with putting non-traditional American hockey markets on "the NHL map"; not only did California receive two more NHL franchises (the Mighty Ducks of Anaheim and San Jose Sharks) during Gretzky's tenure in Los Angeles, but his popularity in Southern California proved to be an impetus in the league establishing teams in other parts of the U.S. Sun Belt.

Gretzky was sidelined for much of the 1992–93 regular season with a back injury (he returned on January 6, 1993, which was also his 1,000th NHL game), and his 65-point output ended a record 13-year streak in which he recorded at least 100 points each season. However, he performed well in the playoffs, notably when he scored a hat trick in game seven of the Campbell Conference Finals against the Toronto Maple Leafs. This victory propelled the Kings into the Stanley Cup Finals for the first time in franchise history, where they faced the Montreal Canadiens. After winning the first game of the series by a score of 4–1, the team lost the next three games in overtime, and then fell 4–1 in the deciding fifth game, where Gretzky failed to get a shot on net.

The next season, Gretzky broke Gordie Howe 's career goal-scoring record of 801, and won the scoring title, but the team began a long slide, and despite numerous player and coaching moves, they failed to qualify for the playoffs again until 1998. After the financially troubled McNall was forced to sell the Kings in 1994, Gretzky's relationship with the Kings' new owners grew strained. Under both McNall and the new ownership group, the team was fiscally unstable, to the point that paychecks to players bounced. Finally, in early 1996, Gretzky requested a trade. During the 1994–95 NHL lock-out, Gretzky and some friends (including Mark Messier, Marty McSorley, Brett Hull and Steve Yzerman) formed the Ninety Nine All Stars Tour and played eight exhibition games in various countries.