David Phillipe Desroisers (born August 29, 1980) is a Canadian musician best known as the former bassist and backing vocalist of the Canadian rock band Simple Plan as well as the former brief time lead vocalist of the band Reset.
On July 10, 2020, Desrosiers had announced that he was leaving the band following sexual misconduct allegations from women on social media.
In 1999, Pierre Bouvier left Reset soon after to join Chuck Comeau in Simple Plan. Desrosiers replaced Bouvier in Reset, which impressed Bouvier and Comeau. Desrosiers was interested in joining another band when he was asked to join the new outfit. He too left the band six months later to join Simple Plan. In 2002, Simple Plan released their debut studio album, No Pads, No Helmets...Just Balls, which featured the singles "I'm Just a Kid", "I'd Do Anything", "Addicted", and "Perfect".
In 2004, Simple Plan released its second album, Still Not Getting Any... which was produced by Bob Rock and led to the subsequent singles, "Welcome to My Life", "Shut Up", "Untitled (How Could This Happen to Me?)", "Crazy", and (in some markets) "Perfect World".
Desrosiers recorded six albums with the band before May 2017, he had been on hiatus from touring with Simple Plan, while he was at home recovering from depression. During that time, a touring musician named Chady Awad had been performing bass with the band as a touring substitute for more than two years, while Bouvier and Lefebvre had divided Desrosiers' vocal parts. This marks the second time Desrosiers has been absent from the band; the first time was in December 2008, when Lefebvre temporarily switched to bass for 2 weeks during live performances.
On June 8, 2019, the band reunited with Desrosiers in Cleveland, Ohio, marking his official return to the band.
On July 10, 2020, Desrosiers announced in his Instagram account that he is withdrawing from the band after "recent public statements have led me to acknowledge that some of the interactions I have had with women have caused them harm."
Desrosiers is a vegan and been a vocal supporter of animal rights, previously collaborating with the Montreal Society for the Prevention of Cruelty to Animals (SPCA).
During his professional career, Desrosiers primarily used Fender Precision basses. He also used Squier basses.