[8] The Minnesota State High School League recognised Cullen's efforts in March and he was named to their 12-member all-tournament team.

[10] In his senior year, Cullen set Moorhead High School single-season records in both ice hockey and baseball.

[15] While Cullen's outstanding play earned him a nomination for the 1995 Minnesota Mr. Hockey Award,[16] he lost to Erik Rasmussen.

[17] Throughout the regular season, Cullen was recruited by numerous local schools including the University of Minnesota, St.

[18] After being put off by the Minnesota Golden Gophers recruiting tactics[19] and the distance between home and Wisconsin, Cullen narrowed his choices to three teams.

Before beginning his freshman season, Cullen worked with strength and conditioning coach Jack Blatherwick to improve his skating.

[28] Despite playing in fewer games as a sophomore, Cullen beat his rookie season totals and finished with 15 goals and 30 assists.

[1] Before the 1996–97 season began, Cullen stated that he felt more confident managing the puck and was more patient with his passing attempts.

[40] After signing his entry-level contract, Cullen was assigned to the Ducks' American Hockey League (AHL) affiliate, the Baltimore Bandits, for the remainder of the 1996–97 season.

[41] He scored his first AHL goal on April 11, against the Philadelphia Phantoms, to help the Bandits secure a spot in the 1997 Calder Cup playoffs.

[45] Cullen spent the majority of the Ducks' 1997 training camp playing alongside their star players Paul Kariya and Teemu Selanne.

[46][48] Despite not being cut, Cullen was made aware that he would be reassigned to the AHL if he was unable to earn regular playing time on the top three lines.

[58] He swiftly recorded five goals over his first three games back to help the Cincinnati Mighty Ducks maintain a season-high three-game win streak.

[69] After ending his rookie season, Cullen was named to Team USA's 1998 IIHF World Championship roster.

[75] Cullen recorded one goal and two assists over his three-game stint in the AHL,[76] and suffered from a broken nose due to a high stick.

[77] Despite this, he immediately tallied two assists in his first game back at the NHL level to help the Ducks end their three-game losing streak.

[79] As a restricted free agent, the Ducks made Cullen a qualifying offer of a one-year $440,000 contract over the summer.

[80] Cullen eventually signed a contract with the Ducks a few days before their training camp opened, but the terms were not publically disclosed.

[81] While Cullen was named to Team USA's 2001 IIHF World Championship roster, he was forced to pull out as he had yet to recover from his wrist surgery.

[82] At the end of January 2003, Cullen and Pavel Trnka were traded to the Florida Panthers in exchange for Sandis Ozolinsh and Lance Ward.

[85] As a non-profit team, SG Cortina's home arena was the Stadio olimpico del ghiaccio and Cullen's monthly salary was $7,930.

[93] After breaking this streak on December 13,[95] Cullen quickly accumulated 20 goals before suffering a broken jaw on January 26, 2006.

[102] After the season ended, he became an unrestricted free agent and subsequently signed a four-year, $11.2 million contract with the New York Rangers.

[101] After just one season with the Rangers, Cullen was traded back to the Hurricanes during the 2007 off-season in exchange for defenseman Andrew Hutchinson, forward Joe Barnes and a third-round draft pick in the 2008 NHL entry draft in the Rangers' attempt to free up salary space underneath the cap.

[104] On February 12, 2010, Cullen was traded to the Ottawa Senators in exchange for Alexandre R. Picard and a 2010 second-round draft pick.

[108] On August 6, 2015, Cullen signed a one-year deal with the Pittsburgh Penguins,[109] reuniting him with former Hurricanes' general manager Jim Rutherford, with whom he won a Stanley Cup in 2006.

[111] On August 16, 2017, after winning back-to-back Stanley Cup championships with the Penguins, Cullen signed a one-year contract to return to the Minnesota Wild.

[112] After Jaromír Jágr was placed on waivers by the Calgary Flames that season, Cullen became the oldest active player in the NHL at 41.