Mattia Casse took in the 2005/2006 season for the first time in FIS races in part, the first launch in the European Cup followed from 2008. Although he initially was unable to provide front places in the European Cup, he came in the 2009/2010 season already in some World Cup races for use . In his World Cup debut in the downhill from Bormio on December 29, 2009, he was 31st and missed the points by just 16 hundredths of a second. At the Junior World Championship in 2010 he won the gold medal in the downhill and the bronze medal in the Super-G.
In the 2010/11 season Casse's European Cup results improved. He drove in nine races among the fastest 15 and achieved his first podium with third place in the giant slalom in Oberjoch . In the World Cup, he won the first points in his eleventh race, the Super-G in Hinterstoder on February 5, 2011, in 29th place. In March 2011 he became Italian champion in super combined. His best World Cup result so far he achieved on February 12, 2012 with the 15th place in the super combination of Krasnaya Polyana . A month later he won a European Cup downhill for the first time in La Thuile . At his first world championships in Sankt Moritz in 2017 , he finished 22nd in the downhill and 19th in the Super-G. In 2019 at the World Championships in Åre, Sweden, he reached 17th place in downhill, 8th in Super-G and 27th in combination.
The following important information is missing from this article or section: