Nicknamed Mr. FC Groningen, Fransen played the majority of his career for FC Groningen and its predecessor GVAV.
He totalled 484 official matches for the club, scoring 82 goals. He also had a spell at Feyenoord.
He made his debut for the Netherlands in an October 1964 FIFA World Cup qualification match against Albania and has earned a total of 6 caps, scoring 1 goal.
He represented his country in 3 FIFA World Cup qualification matches.