Marchment enjoyed more playing time for the Blackhawks, scoring 15 points in the 1991–92 NHL season and 20 points in the next season. On November 2, 1993, Marchment was sent to the Hartford Whalers with Steve Larmer in a trade for Eric Weinrich and Patrick Poulin. Marchment only played 42 games for the Whalers before he was sent to the Edmonton Oilers on August 30, 1994, as compensation for Hartford signing Steven Rice.[3]
After 3 seasons with the Oilers, it was during his fourth that Marchment was traded with Jason Bonsignore and Steve Kelly to the Tampa Bay Lightning for Roman Hamrlík and Paul Comrie on December 30, 1997. During the 1997 season, Marchment suffered a severe concussion and began convulsing on the rink.[8] Marchment only managed to play 22 games for the Lightning until he was once again traded; on March 24, 1998, Marchment, along with David Shaw and a first round pick in the 1998 draft (David Legwand) were sent to the San Jose Sharks for Andrei Nazarov and a first round pick in the 1998 draft (Vincent Lecavalier).[3]
It was with the Sharks that Marchment enjoyed more success, including a career-high 22 points in the 2001–02 NHL season, 20 of which were assists.[3] After a four-and-a-half-year stay with the Sharks he was once again traded; on March 8, 2003, Marchment was traded to Colorado for two draft picks.[9] He only played 14 regular-season games for Colorado and 7 playoff games.[3] A free agent at the end of the season, Marchment signed a one-year deal with his hometown Toronto Maple Leafs on July 11, 2003.[10] In the 2003–04 season Marchment played in 75 regular-season games, scoring just 4 points, and appeared in a further 13 playoff games.[3]
Marchment sat out the 2004–05 NHL lockout-affected season, and was signed by the Calgary Flames as a free agent on October 11, 2005.[3] After the 2005–06 season ended, he became a free agent. As of March 2008, Marchment was a scout and in charge of player development for the Sharks.[11]
Marchment died on July 6, 2022, in Montreal at the age of 53.[2][12][25] He was in town with Sharks management preparing for the 2022 NHL Entry Draft. No cause of death has been released to the public, although it has been described as sudden.[2] Sharks general manager Mike Grier began the announcement of the Sharks' first-round draft pick the following night by eulogizing Marchment.[26]