Complex sentence: Completing the new lineup were Keith Edwards (drums), Kenny Vaughn (guitar), Gary Morse (steel guitar), and Jeff Roach (keyboards), who had previously played in McBride & the Ride's road band.
Split into simpler sentences: Completing the new lineup were Keith Edwards (drums), Kenny Vaughn (guitar), Gary Morse (steel guitar), and Jeff Roach (keyboards). Roach had previously played in McBride & the Ride's road band.