TKO was a hard rock and heavy metal band from Seattle, Washington, which was active between 1977 and 2001. The group's lead vocalist and only consistent member was Brad Sinsel.
Sinsel came to Seattle from his hometown, Yakima, Washington, in the early 1970s. He joined a group called Mojo Hand. As members of the group moved on Brad replaced them with musician friends from his high school days. Eventually all of the members of Mojo Hand were replaced; among these members was Rick Pierce, who later joined Nightshade and found major success in Europe, especially Germany.
Line-up changes continued. Eventually the group settled on a stable line-up and came to the attention of managers who also represented Heart. This led to a major label recording contract in 1977, though it would be more than a year before the first album appeared.
The group released their debut Let It Roll on the Infinity Records division of MCA Records in early 1979 (INF-9005). During this time the group had a type of Glam rock image and fans compared their music favorably with The Who. They toured the U.S. extensively and sold roughly 150,000 copies of the first album. TKO was unable to complete a follow up when Infinity went out of business and was absorbed by MCA in the spring of 1980.