Complex sentence: Mike Smith, known colloquially as Smitty, (born June 13,1959) is the current head coach for the NFL's Atlanta Falcons, a position he has held since 2008.
Split into simpler sentences: Mike Smith, known colloquially as Smitty, (born June 13,1959) is an American football coach. He is the current head coach for the National Football League's Atlanta Falcons, a position he has held since 2008.