2003-04: Duco made his OHL debut with the OHL late in the season – appearing in five games for Kitchener. He score 1 goal with 2 assists and was +3 with 4 PIM. He also played four playoff games with Kitchener. He had 1 assists with 4 PIM and was -2 in the Rangers' first round loss to Plymouth.
2004-05: Duco had a solid rookie season playing on a strong Kitchener team with future NHLers Mike Richards and David Clarkson. Duco scored 24 goals with 26 assists and was +16 with 78 PIM in 62 games. Duco scored eight power play goals but also scored twice on the penalty kill. He saw limited time in Kitchener's run to the Western Conference finals and was scoreless in 15 games with a -3 plus/minus and 11 PIM. He was named to the OHL's All-Rookie Second Team.
2005-06: Duco was once again a power play threat for Kitchener – scoring 11 of his 22 goals with the man-advantage. Duco added 22 assists but was -2 with 113 PIM in 59 games. In the five-game first round playoff series loss to Owen Sound, he scored 2 goals, one on the power play, 2ith 1 assist and was – 2 with 10 PIM.
2006-07: Duco put up his third straight 20-goal season despite missing time during the season and Kitchener was one of the top teams in the OHL during the regular season, finishing with 47 wins behind the OHL's top team, London in the Midwest division. Duco added 20 assists to his 20 goals and was +16 while also playing a pugnacious style with 121 PIM in 54 games. He added 1 goal with 1 assist but was -6 with 12 PIM in nine games as the Rangers reached the second round of the playoffs.
2007-08: Duco attended the Panthers camp as a free agent and was signed to an entry level contract. He was returned to Kitchener for his overage season and recorded career highs in all major statistical categories. Duco scored 32 goals and 22 assists and was +26 and seventh in the OHL with 173 PIM, including seven fighting majors in 62 games. Duco was at his best in the playoffs, scoring 16 goals with 6 assists in 20 playoff games as Kitchener captured the OHL title. He was +13 with 37 PIM and scored four times on the power play. Duco scored 1 goal with 4 PIM in five Memorial Cup games.
2008-09: Duco brought his same high energy, high intensity brand of hockey to the Panthers' AHL affiliate Rochester in his first season of pro hockey. Duco scored 14 goals with 14 assists and was -19 with 147 PIM in 68 games.
2009-10: Duco opened the season with Rochester and made his NHL debut in December, spending nine games with the Panthers. He was also called up in April for a game against the New York Rangers. Duco was scoreless in 10 NHL games with 50 PIM and a -3 plus/minus. He scored 9 goals with 10 assists in Rochester and was -4 with 111 PIM in 59 games. In the Americans' seven playoff games, he scored 1 goal and was -1 with 18 PIM. Duco was re-signed by the Panthers to a one-year contract in July.
2010-11: Duco appeared in two late season games for the Panthers, against Philadelphia and Toronto respectively, and had fighting majors in both games. Duco provide both muscle and goal scoring for Florida's AHL affiliate Rochester. Duco led the offensively-challenged Americans with 20 goals and had 11 assists with a -16 plus/minus and 126 PMs in 67 games. Rochester finished last in the AHL's North Division. The Canucks acquired Duco from the Panthers in a July 2011 trade in exchange for forward Sergei Shirokov.
Duco does not have the typical size of a power forward but plays an in-your-face, aggressive style of hockey. He always finishes his checks and willingly drops the gloves, but can still contributing on the scoresheet and was a power play scorer in juniors and in minor league hockey.
Duco has spent most of the 2011-12 season with the Chicago Wolves, but has played in three games for the Canucks.