His work has appeared in Mad since 1984, and with more than 450 bylined articles, he ranks as one of the magazine's three most frequent non-illustrating writers.

[1] Devlin's recurring features have included "Melvin and Jenkins' Guide to ____," "Badly-Needed Warning Labels for Rock Albums," "Chilling Thoughts," "Stuff My Friend Moish Says," "Pop-Off Videos," "Mad Deconstructs Talk Shows" and "Graphic Novel Review."

[10] In September 2020, with Mad having been reduced to a primarily reprint format, Devlin and Mad artist Tom Richmond announced that they were crowdfunding a book of newly created movie parodies called Claptrap.

The book will also include takeoffs of older popular or iconic films that Mad had for various reasons opted not to parody at the time of their releases.

[11] The other eleven films are The Big Lebowski, Blade Runner, The Blues Brothers, Citizen Kane, Die Hard, Goodfellas, The Princess Bride, Psycho, The Shawshank Redemption, Toy Story 4 and Unforgiven.