Bellamy founded Atonal Tennis, Inc. in 1985 which owned and operated the Palisades Tennis Center, Cheviot Hills Tennis, Santa Monica Tennis Center, Westwood Tennis Center and Westchester Tennis Center. While running those tennis centers, Bellamy invented LiveBall which is played in tennis centers around the world.
In 1985, Bellamy established Atonal Tennis, Inc., which operated the Palisades Tennis Center, Cheviot Hills Tennis, Santa Monica Tennis Center, Westwood Tennis Center, and Westchester Tennis Center. During this time, Bellamy developed LiveBall, a game played in tennis centers globally.