Carl recalls his introduction to role-playing games: "Some junior high buddies back in my home state of Maine first introduced me to roleplaying in 1980... we played Keep on the Borderlands.
[1] After working as the Policy Director for Organized Play for the Magic: The Gathering game, Carl became a member of the Wizards of the Coast R&D team, designing adventures and modules for the Dungeons & Dragons game: "Both careers have their rewards... but I've wanted to be involved in RPG design since I was fourteen - after all, I still remember rolling my first d20.
"[1] When the D&D third edition was released in 2000, Carl was the designer chosen to begin the process of adding detail to the character classes in the supplement Sword and Fist (2001); he felt that this book "is important because it establishes the model for those that will follow it".
[4] In early 2018, Carl was a game producer on the 5th edition of Vampire: The Masquerade (part of the World of Darkness series)[5] and an "executive vice president of community" at White Wolf,[6] a subsidiary of Paradox Interactive.
[14] Em Friedman, for Polygon, stated that L.A. by Night "survived Geek & Sundry's decline [...] in no small part to the masterful work of storyteller and series creator Jason Carl".