[1] His Olympic results include winning a gold medal in the biathlon relay in 2018 with the Swedish team,[2] along with Peppe Femling, Sebastian Samuelsson, and Fredrik Lindström.

[3] Jesper Nelin made his World Cup debut during the 2015–16 season.

His breakthrough performance came in the 2017–18 season when he secured a silver medal in the mixed relay at the Winter Olympics in PyeongChang, South Korea, where he contributed to Sweden’s success in the event.

In the World Cup, Nelin has been part of several relay teams that have earned podium finishes, including victories in the World Cup relay events.

He has also competed in individual events, earning competitive results, and has contributed to Sweden's strong showing in biathlon relay disciplines.