Great news people--after the information you all gave me, it definitely is not a brown recluse (it doesn't have the "fiddle" shape on his head....)

Turns out it isn't poisonous, either--at least, not lethally! I sprayed near it's "home" the other day and haven't seen it since. Let's keep our fingers crossed!

Thank you, thank you, thank you for the information!! I knew I could count on you guys!