Karl has fallen victim to some unfortunate injuries, including a knee injury which ruled him out of the whole 2004-05 season. However, Karl showed his resilience to return as captain, playing a key role in achieving promotion to the [[Football League Championship]] during the 2005-06 season. Karl scored against rivals [[Ipswich Town F.C.|Ipswich Town]] on [[September 29]] 2006 at [[Layer Road]].
==Personal life==
On [[21 January]], [[2007]], tabloid reports appeared reporting that Duguid had walked out on his fiancee and their two children without warning in November [[2006]] after 12 years together - then dumped her by text. The "heartless" Colchester United captain left home after daughters Millie, nine, and Connie, five, had gone to school. He then sent childhood sweetheart Tanie Marshall a short message saying he had had enough. Duguid, who reportedly earns around £60,000 a year, ended the relationship with the simple words: ''"Sorry, I just can't do this any more."'' <ref>[http://www.sundaymirror.co.uk/news/tm_headline=my-football-star-partner-of-12-years-went-out-for-a-paper-and-never-came-back%26method=full%26objectid=18510536%26siteid=62484-name_page.html my-football-star-partner-of-12-years-went-out-for-a-paper-and-never-came-back]</ref>
Duguid has now told Tanie he's found someone else, and is now going out with a 25-year-old brunette from Colchester.