Career
Stefáni rode for the Oxford Cheetahs in 1996 under the assumed name "Mark Frost" assuming a South African nationality. Team World Championship (Speedway World Team Cup and Speedway World Cup)
2001 - 10th place
2002 - 10th place
2004 - 8th place
2005 - 3rd place in Qualifying round 2
2007 - 4th place in Qualifying round 2
Individual European Championship
2003 - Slaný - 15th place (3 pts)
European Pairs Championship
2004 - Debrecen - 4th place (4 pts)
European Club Champions" Cup
2004 - Ljubljana - 5th place (6 pts).
