 All the studio and live recordings with his past and present bands included, Westerlund has played on approximately 50 albums.In the autumn of 2012 he released his debut solo album named "Oran".In 2013 he started a collaboration with Jyrki Nissinen, a Finnish cartoonist and musician, composing a soundtrack album for his comics book, "Kehittymättömät ufot" ("The Undeveloped Flying Objects").