[1][2][3] Thorssell joined Wolverhampton Wolves in the Elite League for the 2012 season, as a replacement for Pontus Aspgren who had picked up an injury.
[5] After continuing to impress in 2013 and also in 2014 Thorssell made the step up to being one of Wolverhampton's three heat leaders for the 2015 season, and was the first rider to be announced in their team.
[6]In 2016 he won the Wolverhampton Olympique[7] but in 2017, he broke a bone in his lower back riding for the Wolves.
[10] In 2024, he helped Sweden secure a bronze medal at the 2024 Speedway of Nations in Manchester.
[11] Thorssell ended his 2024 season by just missing out on qualification for the 2025 Speedway Grand Prix by finishing fifth in the 2025 GP Challenge.