Biography by Katherine Fulton Originally known as Penumbra, Tom Brown (bass, vocals), Mike Mazzarese (percussion), Dave Fyten (guitar, vocals), and Andrew Breit (guitar, keyboards, vocals) recruited Brett Ditgen for lead vocal duties and became Red Line Chemistry in 2004. The hard rock group released an EP the same year and received radio support in its native Kansas City, MO, before following up with its full-length debut, Chemical High and a Hand Grenade, in 2006. Red Line Chemistry enjoyed continued success in 2007 with appearances at Kansas City Rock Fest 2007 and the Warped Tour.