Origin
Legs Largon was a racketeer who worked for Proteus. He was quite successful and was planning on retiring in a few years just before he was killed. When the Creeper came looking for answers to Proteus’ identity Proteus killed Mr. Larson before he could reveal any information.
Creation
Legs Larson was created by Steve Ditko. His first appearance is in Beware the Creeper 2.