The son of NHL Director of Hockey Operations Colin Campbell, Gregory Campbell first appeared in the OHL in 2000-01 with the Plymouth Whalers, registering a modest 14 points in 65 games. He took tremendous strides the next year with the Whalers in an increased role, compiling 53 points in 65 games. He was traded in the off-season, and spent the 2002-03 season playing with the Kitchener Rangers, playing in 55 games and averaging more than a point-per-game with 56 points while solidifying himself as one of the better two-way forwards in the league. He made the jump to the AHL where he began adjusting to the faster pace of professional hockey, but was able to impress the Florida management staff enough to get an uneventful two-game stint in Florida.
Not quite 200 lbs, Campbell is a little lean, but makes up for any lack of size with great speed and persistence. A very strong two-way player, Campbell is able to chip in offensively while serving as a true shut down type of player. Equally effective on the penalty kill, Campbell is extremely bright for a young player and demonstrates that with smart plays and good positioning to accompany his strong work ethic and gritty on-ice demeanor.