Kafka started playing rugby at the age of seven at his hometown club.
He went to Spain in 1999, playing for Valencia, who were then in the Spanish Second Division (División de Honor B).
In 2001 he joined La Moraleja Alcobendas, which boasted international players such as the Souto brothers, Carlos and Sergio.
His two seasons at the club was a particularly successful part of his career, with him leading the club to victory against Overmach Parma in the European Challenge Cup in 2002 and finishing up as top scorer in the Spanish First Division (División de Honor) in both 2002 and 2003.
He won at least 37 caps[2] for the Czech Republic from 2000 to 2006, scoring at least 136 points in the process before assuming the coach's mantle in 2007.