The Brief The Sixers announced the signing of NBA legend LeBron James, and revealed what jersey number he will wear. The Philadelphia 76ers on Monday officially announced the signing of NBA legend LeBron James. What we know:The Sixers shocked the basketball world when the 41-year-old announced on social media that he would be signing with the Sixers. The Sixers announced on Monday that he will wear No. MORE: LeBron James signing with the Philadelphia 76ers: 'I am so excited'What we don't know:The Sixers have not announced when they will officially introduce LeBron James.