Simplify the following text for a Grade 9 native English-speaking person.
Original: He was the only member of TLI who had also been doing stand-up comedy in his free time He was called back for a second audition a few weeks later and was invited to be a cast member ; Schaffer and Taccone were invited to join the writing staff based on their work in the trio .
Simplified: He was the only member of the group who had also been doing stand-up comedy in his free time . He was called back for a second audition a few weeks later and was ultimately invited to be a cast member ; Schaffer and Taccone were invited to join the writing staff based on their work in the trio .