I really like this; it seems like a rare look into the mind of the professionally hardcore. You have a great handle on the voice of the character, as well; I particularly like the third paragraph. Great work!
There’s a really strong back-story between the mother and our anti-hero there, that comes through very vividly even with the small amount of characters used to paint that picture for us. It’s somewhat subdued, but the emotional abuse is apparent through the word choice. Very well done.
In the penultimate paragraph, I think it should be “from time to time,” striking the extraneous definite article.