[1] Sandell started playing handball at Eslövs HF.

[2] He debuted for the senior team in 2015, where he shared the right back position with Kim Andersson.

[9] In his first season at the club, he reached the Champions League final, where Aalborg lost to FC Barcelona 23-36.

[12] Here he won the Hungarian Cup and the IHF Men's Super Globe in 2024.

Sandell debuted for the Swedish national team at the 2021 World Men's Handball Championship in a match against North Macedonia.