He was the silver medallist over 10,000 metres at the 2007 European Athletics U23 Championships and represented his country at the 2008 European Cross Country Championships, coming ninth in the senior men's race. Butter was the winner of the Tilburg Warandeloop in 2008 and won the half marathon at the 2009 Berenloop road race. He was 16th in the race at the 2010 European Cross Country Championships.