Brown Recluse spider's have the ability to breed with other species of spiders, which has the effect of changing their appearances. It also pretty much dilutes their venom. So there are spiders out there that may have the markings of both, but aren't really much of a danger.
While the picture you posted doesn't really look like a brown recluse the pictures are kinda hard to see. It looks more like a wolf spider. Big question, is it hairy? BR's have very tiny hairs, they're almost naked. So if it's hairy then you're probably safe.
Here's a pic of a wolf spider:
The markings match the edited one
pinkie posted. I have a feeling you're probably okay. To be safe you could always take it to an exterminator.
But at the very least you should probably just kill it. It's the only way to be sure.