Complex sentence: Adam Birch (born July 18,1979) is a retired American professional wrestler, best known for his tenure with World Wrestling Entertainment (WWE), and training in WWE's developmental territory Florida Championship Wrestling, as Joey Mercury.
Split into simpler sentences: Adam Birch (born July 18,1979) is an American professional wrestler. Birch is signed with World Wrestling Entertainment (WWE), and works as a trainer in Florida Championship Wrestling, WWE's developmental territory, as Joey Mercury.