Career
Colaiacovo also has an identical twin brother, Paulo Colaiacovo, who has also played professional ice hockey, as a goaltender. Colaiacovo was drafted 17th overall by the Toronto Maple Leafs in the 2001 National Hockey League Entry Draft. He scored his first career National Hockey League goal on November 8, 2005, against the Washington Capitals.
On January 23, 2006, Colaiacovo missed a hipcheck on Václav Varaďa in a game against the Ottawa Senators, smashing head-first into the boards.
He was taken off the ice on a stretcher. The injury was a major concussion, and he missed the end of the 2005-2006 season.
He was then sent to the Toronto Marlies, the Maple Leafs" American Hockey League (AHL), on a conditioning assignment. Colaiacovo recovered fully from his concussion, but later injured his hand in his first game back into the Marlies lineup.
On December 4, the Maple Leafs recalled Colaiacovo from the Marlies and on December 16, he scored his first goal of the season against the New York Rangers.
Colaiacovo underwent arthroscopic knee surgery on April 29, 2007. On November 24, 2008, Colaiacovo was traded by the Maple Leafs, along with Alexander Steen, to the Saint Louis Blues in exchange for forward Lee Stempniak. Colaiacovo finished the 2008-2009 season with 30 points between Toronto and Saint Louis.
In the 2009-2010 season, he registered a career-high 32 points, finishing second among Blues defencemen.
After the 2010-2011 season, he joined Team Canada at the IIHF World Championship in Slovakia. On September 12, 2012, Colaiacovo signed a two-year deal with the Detroit Red Wings.
In his second game of the season, Colaiacovo suffered a shoulder injury that kept him out for 33 games. He made his home debut for the Red Wings on April 1, 2013, against the Colorado Avalanche.
When asked about his feelings over his home debut, Colaiacovo replied, “I"m really looking forward to lieutenant
I haven"t had that chance to do it in a Wings uniform. That"s something that"s going to keep the adrenaline going for me tonight."
With the lockout-shortened 2012-2013 season, again largely affected by injury, Colaiacovo was bought out on a compliance from the final year of his contract with the Red Wings on July 3, 2013. On November 13, 2013, Colaiacovo agreed to a one-year, $550,000 deal to return to the Saint Louis Blues as a free agent.
The Blues added Colaiacovo after learning that defenceman Jordan Leopold would be out eight weeks due to hand surgery.
On October 30, 2014, Colaiacovo signed a deal with the Philadelphia Flyers. He was signed to a one-year, two-way contract for $625,000.
On July 3, 2015, Colaiacovo signed a one-year deal as a free agent with the Buffalo Sabres.