Les is the original owner of Santa's Little Helper running at the Springfield Downs Dog track. After Santa's Little Helper lost on Christmas Eve, he abandoned him in the parking lot and Homer and Bart decide to adopt him.
After Santa's Little Helper became the new mascot of Duff Beer, Les came back and claimed him again to get the money the dog was getting. Eventually, when a new mascot for Duff Beer was found, he let the Simpsons have him again due to him being worth no money any more.
In the book, "The Simpsons: One Step Beyond Forever", it is revealed that his first name is Les.
- Episode – "Simpsons Roasting on an Open Fire"
- Episode – "Old Yeller-Belly"
- Book – The Simpsons: One Step Beyond Forever