The first incarnation, a composite of two brothers, Charles Chandler and Hal Chandler, first appeared in Marvel Premiere #35 (April 1977).[1][2] The second incarnation, Delroy Garrett, took on the name in Avengers: The Initiative #14, having debuted as Triathlon a decade before in Avengers (vol. 3) #8 (September 1998).[3]
^DeFalco, Tom; Sanderson, Peter; Brevoort, Tom; Teitelbaum, Michael; Wallace, Daniel; Darling, Andrew; Forbeck, Matt; Cowsill, Alan; Bray, Adam (2019). The Marvel Encyclopedia. DK Publishing. p. 373. ISBN978-1-4654-7890-0.