Years before the Battle of Yavin, Throgg was a successful moisture farm operator, but the Empire took control of many local businesses on Tatooine, including Throgg's farm. Throgg was forced to flee Tatooine and embark upon a smuggler's life just to make ends meet.
Shortly after the destruction of the first Death Star at the Battle of Yavin, Rebel Alliance hero Luke Skywalker returned to Tatooine to go over his late family's effects. His uncle Owen and aunt Beru Lars once owned a moisture farm just outside of the Jundland Wastes. Luke knew that his responsibilities to the Alliance prevented him from managing the farm, so he used the Force to guide him towards someone who could benefit from ownership of the property. The Force led him to Chalmun's Spaceport Cantina, where he found Throgg sitting at a table in the corner. He offered him the deed to the Lars farm, but Throgg did not trust Luke's intentions. He crumpled the piece of paper up and threw it behind his shoulder, uninterested. Unrelated events forced Luke to leave the cantina, but Throgg later reconsidered the offer and recovered the deed. Despite his gruff nature, Throgg was eternally grateful for the chance to operate a moisture farm once again.
After a few seasons, Throgg came under the notice of Huff Darklighter. Huff wanted to monopolize the moisture farming industry on Tatooine and attempted to institute an alien landowner tax. Huff's brother Jula intervened and purchased the Lars farm before Huff could successfully implement the tax. The more scrupulous Darklighter brother maintained the deed of ownership but allowed Throgg to continue working as a tenant.