Complex sentence: The New Left is a band composed of guitarist Kyle Cook (of matchbox twenty), guitarist Eamon Ryland, drummer Brett Borges, and bassist John Kibler.
Split into simpler sentences: The New Left is a band noteworthy because one of its guitarists, Kyle Cook, is also a member of matchbox twenty. Other members are guitarist Eamon Ryland, drummer Brett Borges, and bassist John Kibler.