Duco began his Ontario Hockey League career late in the 2003–04 season with the Kitchener Rangers. In five games Duco registered one goal and two assists and added another assist in three playoff games. In his first full season Duco recorded 24 goals and 50 points in 62 games. He also registered a +16 rating, eight power play goals, and two shorthanded goals. At season's end Duco was named to the OHL's All-Rookie Second Team. Prior to the 2005–06 season Duco was invited to the Edmonton Oilers training camp. He failed to make the team or be given a contract and returned to Kitchener. There his overall production dipped to 22 goals and 44 points, but he increased his power play goal total to 11. In the post-season Duco added 2 goals and an assist in 5 games. The following year, he was again invited to Oilers camp where he was unable to gain a contract and was reassigned to the Rangers. During the 2006–07 season Duco registered his third straight 20 goal season, but his production dropped for a second consecutive season registering 40 points. In the playoffs Duco notched a goal and an assist in nine post-season games. In the off-season Duco was invited to the Florida Panthers training camp in Kitchener. His performance at this camp earned him an invite to the Panthers main training camp, where he played in one pre-season game and was signed to an entry-level contract. Duco was reassigned to Kitchner for his overage season and set career highs in goals, 32, points, 54, and penalty minutes, 173.
Professional
Duco played his first professional season with the Panthers American Hockey League affiliate the Rochester Americans in the 2008–09 season. He finished the year with 14 goals, 28 points and 141 PIMs. Duco ranked fifth on the team in goal scoring while leading the club in penalty minutes. The following season Duco began the year with Rochester but was called up by the Panthers where he made his NHL debut on December 2, 2009 in a game against the Colorado Avalanche. He finished the year playing in 10 NHL games without recording a goal or an assist but notched 50 PIMs, in the AHL he recorded 9 goals and 19 points in 59 games. In the off-season he was re-signed by the Panthers to a one-year deal. In the 2010–11 season Duco had a professional career high with 20 goals in 67 games for the Americans, but managed to play in only two games for the Panthers. His 20 goals led Rochester. At the end of the season Duco became a restricted free agent and the Panthers tendered him a qualifying offer. During the off-season, on July 9, 2011, his rights were traded by the Panthers to the Vancouver Canucks for the rights to Russian winger Sergei Shirokov. Five days later he signed a contract with Vancouver. He played six games for the Canucks in the 2011-12 season, spending most of the season with the Canuck's American League affiliate Chicago Wolves. The Canucks declined to re-sign Duco following the season, making him an unrestricted free agent. Duco then joined Red Bull Salzburg of the Austrian League for the final 21 games of the 2012-13 season. In September 2013, the Toronto Marlies of the American Hockey League announced the signing of Duco to a Training Camp Tryout agreement, then later to a one-year agreement. On October 6, 2014, Duco signed as a free agent to a one-year ECHL contract with the Indy Fuel in their inaugural season in 2014–15. At the conclusion of the season with the Fuel, Duco opted to return to Europe, signing a one-year contract with English club, the Sheffield Steelers of the EIHL on June 14, 2015.
Playing style
At 5 foot 10 inches tall, Duco was small for a power forward, but played an aggressive physical style with a willingness to fight. He played an energetic game, and was known to finish his checks, and could be an agitator. Peter DeBoer, who coached Duco, said that Duco didn't play small but rather played like a player a foot taller.
