Early years

Campbell grew up playing minor hockey in his hometown of Strathroy, Ontario, where he won an OMHA Championship at the novice level. He also played AAA hockey for the Elgin-Middlesex Major Bantam Chiefs, along with future NHL teammate Joe Thornton, in 1993–94, which was the organization's inaugural year. In 1994–95, Campbell signed with the Petrolia Jets Jr.B. (OHA) of the Western Ontario Hockey League (WOHL).

Following his season with the Jets, Campbell was drafted by the Ottawa 67's. The 67's first-round pick that season was Nick Boynton, who would end up being a defence partner with Campbell for four seasons in Ottawa; they reunited 15 years later as teammates on the 2010 Stanley Cup-winning Chicago Blackhawks.

Campbell was taken by the Ottawa 67's in the OHL as a third-round draft pick in the 1995 OHL Priority Selection. In 1998–99, he won the Red Tilson Trophy as the OHL's Most Outstanding Player. He also won the Max Kaminsky Trophy as the OHL's Defenceman of the Year and the William Hanley Trophy as the OHL's Most Gentlemanly Player, CHL Player of the Year, and finally, the Memorial Cup as Ottawa defeated Calgary 7–6 in overtime on home ice.^[8][9]

Buffalo Sabres

Campbell was drafted by the Buffalo Sabres as their sixth-round pick in the 1997 NHL Entry Draft. He played his first game for the Sabres in the 1999–2000 season and stayed with the team, wearing number 51, until February 26, 2008, when he was traded to San Jose. During the NHL lockout in 2004–05, he played for Jokerit in the Finnish SM-liiga and won the silver medal in the league championships.

On January 9, 2007, Campbell was the leading vote-getter amongst Eastern Conference defenceman for the 2007 NHL All-Star Game, earning him his first All-Star appearance. As a result of the Sabres' rotating captaincy policy, Campbell was named an alternate captain for the month of November 2007 and captain for the month of December. Campbell was then selected again to the 2008 NHL All-Star Game.

Campbell with the Sharks in 2008

San Jose Sharks

The 2007–08 season was the final season Campbell was under contract with Buffalo. On February 26, 2008, at the NHL trade deadline, the Sabres traded Campbell, along with their seventh-round draft pick in the 2008 NHL Entry Draft (194th overall; Drew Daniels), to the San Jose Sharks in exchange for forward Steve Bernier and their 2008 first-round pick (26th overall; Tyler Ennis). The Sharks were eventually eliminated in the Western Conference Semi-finals by the Dallas Stars, and Campbell became a free agent at the conclusion of the season.

Campbell also led the NHL during the 2007–08 season in games played, being one of just two players to appear in 83 games, or one game more than a team's full schedule, because of his trade to San Jose; the other was Jeff Halpern. Campbell was named a member of the NHL Competition Committee on April 21, 2008.

Chicago Blackhawks

On July 1, 2008, Campbell signed an eight-year contract as an unrestricted free agent with the Chicago Blackhawks for roughly $7.1 million annually. Fox Chicago reported that Campbell chose to sign with the Blackhawks despite allegedly receiving better contract offers from other organizations.^[10] He played in all 82 of Chicago's regular-season games in the 2008–09 season, scoring seven goals to go with 45 assists. He contributed two goals with eight assists in 17 Stanley Cup playoff games that season as Chicago advanced to the Western Conference Finals, where they were eliminated by the Detroit Red Wings.

On March 14, 2010, Campbell was injured in a boarding incident caused by Washington Capitals captain Alexander Ovechkin. Ovechkin was assessed a major penalty and game misconduct for boarding, while Campbell did not return to the game. As a consequence of the illegal boarding hit, Ovechkin was suspended two games by the NHL. Campbell sustained a broken clavicle and broken rib, and was expected to miss seven-to-eight weeks. Despite this, Campbell managed to return by Game 4 of the first round of the 2010 playoffs against the Nashville Predators, igniting the team to a three-game win streak to knock Nashville out of the playoffs, four games to two. Campbell had played in 388 consecutive games prior to the injury.^[11] In the Finals, in Game 6, with the Blackhawks up three games to two in the series, Campbell recorded the lone assist on Patrick Kane's overtime game-winner to down the Philadelphia Flyers and clinch the Stanley Cup on June 9, 2010.

Florida Panthers

During the 2011 NHL Entry Draft, Campbell was dealt to the Florida Panthers in exchange for forward Rostislav Olesz.^[12] During his first season in Florida, Campbell had 49 assists to go with 4 goals for 53 points and only six penalty minutes, becoming the first defenceman since Red Kelly in the 1953–54 season to win the Lady Byng Memorial Trophy for sportsmanship and gentlemanly conduct combined with a high standard of playing ability.^[13]

Return to Chicago

On July 1, 2016, Campbell signed a one-year contract as an unrestricted free agent with Chicago for roughly $2 million in base salary, with additional performance-related bonuses included.^[14]

On July 17, 2017, Campbell announced his retirement, but also that he would join the Blackhawks' business operations department where he will be assisting with various marketing, community relations, and youth hockey initiatives.^[15]

Regular season and playoffs

International