At middleweight yes, I wasn't saying he had fought there but still could you see him beating a middleweight? and 157 is a middleweight.
Personally I think Malinaggi would have probably been stopped in all of those fights Mosely has had, except maybe Canelo. Mosely has always looked a bit better at WW imo but the weight cutting could affect him.
The fact is though he'll have been out of the ring for less than a year and Paulie hardly looked great in his last one. Mosely has a very real chance and should be a threat for 12 rounds. Not like Paulie would have won any of Mosely's last 4 either.