Mats Olausson, Former Yngwie Malmsteen Keyboardist, Dies at 54 Mats Olausson, Former Yngwie Malmsteen Keyboardist, Dies at 54 Mats Olausson, a former keyboardist for Yngwie Malmsteen, has died at the age of 54. Olausson was found dead in his hotel room in Rayong, Thailand.Anya ZadroznyAnya Zadrozny