|Date of birth||16 November 1965|
|Place of birth||Turku, Finland|
|Height||1.80 m (5 ft 11 in)|
|1988||→ Bellinzona (loan)||14||(3)|
|1988–1989||→ Bologna (loan)||3||(0)|
|1993–1994||Hapoel Be'er Sheva||11||(3)|
* Senior club appearances and goals counted for the domestic league only.
During his career (1982–1994) he played in Finland, Italy, Switzerland, Germany, and Israel for TPS, Internazionale, Bellinzona, Bologna, Hertha BSC, Hapoel Be'er Sheva F.C. and Tampereen Pallo-Veikot. He finished his career at a relatively young age because of a persistent ankle injury, and because of this, he ended up concentrating more on his studies. Aaltonen studied throughout his playing career, and after he retired from football, he earned a doctorate degree in economics.
Aaltonen is best remembered for a superb goal scored against Italian goalkeeper Walter Zenga in UEFA Cup in 1987 during a match between Turun Palloseura and Inter Milan at the San Siro stadium in Milan. This goal more or less earned him a transfer to Inter shortly afterwards.
- Jalkapallon Pikkujättiläinen (WSOY 2003) ISBN 978-951-0-27037-0 (in Finnish)
- Mika Aaltonen at National-Football-Teams.com
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