Complex sentence: Stan is married and has two sons that are extremely successful musicians, Josh 35 and Jason 33, presently Josh Freese plays drums for Nine Inch Nails (musician) and Jason Freese plays keyboards, guitar, saxophone and vocals with Green Day.
Split into simpler sentences: Stan is married and has two sons, Josh 35 and Jason 33, that are extremely successful musicians. Presently, Josh Freese plays drums for Nine Inch Nails (musician) and Jason Freese plays keyboard, guitar, saxophone and vocals with Green Day.