Lopez is one of my favorite "bad Orioles." For some reason, I like him.
He's got closer stuff at times, IMO. Upper 90s and I think his breaking stuff can be pretty nasty when he harnesses it.
He showed last year that he's not a high leverage guy, IIRC, there were quite a few blown save opportunities. I don't mind trying him some more at closer because I think there's a spot for him somewhere in the bullpen, they just have to try and figure out what it is. While I think he's probably not a closer, it doesn't hurt to give him a few more cracks at it. Most likely he's a middle relief guy, someone that can get you through the opponents order once.