our snake

We found this snake today under one of the rocks in the backyard. We've seen two more like him this spring, one of which was under the same rock several weeks ago. Originally, I thought it was a baby black rat snake, but after spending the last hour trying to identify him, I've decided that he's either a worm snake or a rough earth snake. (Or maybe a smooth earth snake?) I've also learned that he's not a baby, but full grown. I wouldn't have messed with him, except that I was concerned Eric might decide to mess with him. After giving him a few pets, I let him go, in an undisclosed location, under another, safer rock.