From Halopedia, the Halo wiki
He was once on a mining crew. During a mining accident he fell into liquefied rock with his right arm out trying to catch himself. The arm was subsequently turned to stone while Eddie was forced to replace it with an artificial limb. After the accident, he retired from mining and eventually hung his stone arm in his bar: Eddie's In The Rock, which was located in the outskirts of the Rubble. The bar was mainly for miners who were still excavating asteroids. He is noted for being obsessed with cleanliness despite the generally untidy condition of his bar.
List of appearances