Gary Dean Richrath (October 18, 1949 – September 13, 2015) was an American guitarist, best known as lead guitarist and a songwriter for the band REO Speedwagon from 1970 until 1989. REO Speedwagon (originally styled as R.E.O. Speedwagon) are an American rock band. Formed in 1967, the band cultivated a following during the 1970s and achieved significant commercial success throughout the 1980s. Hi Infidelity (1980) contained four US Top 40 hits and is the group's best-selling album, with over ten million copies sold. Over the course of its career, the band has sold more than 40 million records and has charted thirteen Top 40 hits, including the number ones "Keep On Loving You" and "Can't Fight This Feeling". REO Speedwagon's mainstream popularity dissipated in the 1990s but the band remains a popular live act.
He left REO Speedwagon in 1989, and released a solo album titled Only the Strong Survive in 1992 under the name "Richrath." On November 22, 2013, REO and Styx announced a benefit concert titled "Rock to the Rescue" to raise money for the affected families of the tornado in central Illinois. The concert was held on December 4, 2013 in Bloomington, Illinois. Richrath reunited with REO for a performance of "Ridin' the Storm Out" to end REO's set at the sold-out concert.