Jack has made various guest appearances in several books over the years, including Marvel Two-In-One, The Defenders, Marvel Premiere, (in a solo story meant to launch the character in his own series) ROM, and Marvel Team-Up, (which served as an intro to his 1984 mini-series) among others.
He was later made a regular in The Avengers by writer Kurt Busiek, who explained, "I first ran into Jack in Deadly Hands of Kung Fu in an issue drawn by Gil Kane and Rico Rival.