The Orange County coroner's office said Tuesday Bevacqua was found inside his Laguna Beach home, the Los Angeles Times reported.
The cause of death has not been determined. An autopsy was scheduled.
LRG, or Lifted Research Group, combined urban wear with skate apparel, Hymie Betesh told the Times Tuesday.
"In essence, they almost created a new genre in sportswear," said Betesh, chief executive officer of clothing firm DrJays.com.
Public records indicate Bevacqua was born Oct. 23, 1977, and was adopted into a family with six other adopted children of different races and ethnicities, the Times said. Bevacqua said his background helped him succeed in the fashion industry.
"I didn't feel there was a clothing company to bridge the gap between all these different things that we were into -- that spoke for that melting pot of what was going on. That's what LRG was all about," he said in an interview with The Orange County Register.
Bevacqua, who co-founded LRG with Robert Wright in 1999, is survived by his fiancee, son, parents and seven siblings.