[2] While at the National Lampoon, he co-wrote with Michel Choquette the satirical comic strip Son-O-God,[6] about "a WASP superhero who fights Catholicism", illustrated by Neal Adams.
[2] As a freelancer, he was eclectic; published in Harper's Bazaar, Benetton's Colors, Interview, Irish America, the Old Farmer's Almanac, Playboy, Spy, The Village Voice, and The Quarterly of Joyce Studies.
Of his contribution to the Off-Broadway musical Diamonds (1984), Christian Science Monitor critic John Beaufort wrote, "Certainly the most exotic parody of the occasion is Sean Kelly's hilarious Kasi Atta Batt, which turns out to be a Japanese Kabuki version, complete with lion dancer and samurai, of the lament known to untutored Western ears as Casey at the Bat.
He also participated in "adult television" – including a brief stint on Saturday Night Live,[citation needed] two attempted baseball/variety shows, a sit-com series, a couple of crime dramas, and the re-re-cycling of Woodstock; he appeared on the small screen hosting a PBS arts show, trying to swim in a suit of armor, and dressed as a beaver.
He wrote (or co-wrote) many books, only one of which has been translated into Japanese,[citation needed] including a number of collaborations with Rosemary Rogers.