He is the younger brother of former France national football team goalkeeper and Bordeaux legend Cédric Carrasso.

He made his league debut that season, as well, on 26 October in a 2–3 loss to Clermont Foot starting in place of the injured Jourdren.

[3] Following an extensive injury to Jourdren, he made three consecutive starts recording two shutouts against Niort[4] and Guingamp[5] and losing to Ajaccio 1–2.

[9] At the expiration of his contract, Carrasso left the club at the end of the 2018-19 season, having made 44 appearances since his arrival in 2016, having largely been used as a substitute goalkeeper behind first choice Edouard Mendy.

Johann earned his first France youth cap with the under-18 team making his debut in the 2006 edition of the Sendai Cup.