Sonnenberg was born in Wetaskiwin, Alberta. Undrafted, Sonnenberg started his professional hockey career with the Saskatoon Blades of the WHL in 1995. He signed with the Pittsburgh Penguins in 1998, and after several years in the NHL and AHL Sonnenberg signed with KalPa of the Finnish SM-liiga in 2006. He was named captain of KalPa, becoming the first foreign-born captain in the league. At the end of the 2006–07 season he decided to retire from professional hockey, however, in the Winter of 2007 Sonnenberg received the call of HC Ambrì-Piotta, a Swiss club of the National League A.\n', '

During his second season in Switzerland, Sonnenberg left Piotta on January 13, 2009, after he signed a contract with Timrå IK of the Swedish Elitserien. In his first full season with the club in 2009–10, Sonnenberg became a fan favourite and led the club with 20 goals for 42 points in 42 games. Despite a willingness to continue on with Timrå, Sonnenberg was forced to retire from professional hockey due to a chronic knee injury. He returned to Canada to work in a family owned construction firm.\n', '

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