Who is Stammas in Shawshank Redemption?

In "The Shawshank Redemption," Stammas is a minor character who is a prison inmate at Shawshank State Penitentiary. He is part of a group of prisoners who interact with the main characters, Andy Dufresne and Ellis "Red" Redding. Stammas does not play a central role in the plot, but he contributes to the depiction of life within the prison and the camaraderie among inmates.