Career
He set the record for most red cards in Allsvenskan (7), later matched by Mats Rubarth, in a time when the red card was less common. In 1981 he became manager for IFK Hässleholm. During 1983 and 1985 he became manager for his old club, Landskrona BoIS. In 1983 the team almost got to qualify for Allsvenskan.
But the following year everything went wrong and Landskrona BoIS became instead relegated to tier 3 of Swedish football (as one of 144 teams in 12 regional leagues, instead of 28 teams in two leagues).
However the club let him carry on, and after a very weak start he managed to make a turn during the second part of the 22-game league. Everything eventually came to be decided by a penalty shootout at Landskrona Intellectual Property, of which BoIS came out as the winners and returned to tier 2 of Swedish football in 1986.
But for Claes Cronqvist as manager at some kind of important level, 1985 was his last season. He later worked as a trainer in the lower divisions.