The son of the ski racer and trainer Alessandro,[2] Casse made his World Cup debut on 29 December 2009 in a downhill at Bormio, just missing out on points in 31st place.[3] He scored his first World cup points later that season on 10 March, finishing 22nd in the Garmisch-Partenkirchen downhill.[4]
Casse attained his first top ten result in December 2015 with a fourth place in the Super-G at Beaver Creek, just missing the podium;[5] his first podium came in December 2022 on the Saslong, taking third in the second downhill of the week at Val Gardena.