Valtonen started his pro career in Ilves in 1997, and played his next season with the Plymouth Whalers in the OHL, and returned to the SM-liiga in 1999 and has played for Jokerit since.
Valtonen started his pro career in Ilves in 1997. Valtonen played his next season with the Plymouth Whalers in the OHL. Valtonen returned to the SM. Valtonen liiga in 1999. Valtonen has played for Jokerit since.