[3] By late 1970, REO Speedwagon had finalised its first recording lineup with the addition of guitarist Gary Richrath in place of Scorfina.
[5] In early 1972, shortly after the release of the band's self-titled debut album, Luttrell left REO Speedwagon following a disagreement with Richrath.
[10] The band's lineup remained stable thereafter for more than ten years until Gratzer decided to retire in 1988, with Graham Lear brought in as his replacement.
[12][13] Also in 1989, Bryan Hitt replaced Lear on drums,[14] while Jesse Harms joined as a second keyboardist, performing on the band's 1990 album The Earth, a Small Man, His Dog and a Chicken.
[18] Bissonette continued to play with REO Speedwagon until the group disbanded in December 2024,[19] due to tensions between Doughty, Hall and Cronin.