Career
In basketball, the 186-centimetre-tall (6 ft 1 in) Jantunen played his whole Master of Science-sarja career for Tampereen Pyrintö. He also worked as the head coach of the team for two seasons in the 1960s. Pyrintö has retired Jantunen"s jersey but allows players to use his number 5.
Jantunen had 50 caps for the Finland national basketball team and belonged to the Finnish squads in EuroBasket 1957, EuroBasket 1959 and EuroBasket 1961, placing best at 1957 (11th).
Basketball Handball.