Riggby began his career as a priest at a small chapel. At some point, he met with Mordenkainen and other members of an adventuring band the wizard was forming, and soon became a founding member of the Citadel of Eight.

Riggby was one of the adventurers, along with Mordenkainen, Bigby and Yrag, who delved into Maure Castle to face off against Eli Tomorast and the demon Kerzit. Riggby, along with Mordenkainen’s Citadel of Eight also delved into the dungeons underneath the Temple of Elemental Evil.

In 570 CY, Riggby accompanied Lord Robilar into the dungeons underneath Castle Greyhawk in an ill-fated attempt to free, and then permanently kill, the demigod Iuz, who had been imprisoned there since 505 CY by Zagig Yragerne. Sometime after the failure and release of the demigod, he settled down in Greyhawk City as the head of city’s great temple of Boccob, and spent much of the balance of his life in retirement.

In 597 CY, Riggby died of natural causes in Verbobonc