Penn will fold just like he did against Fitch, and MacDonald has better GnP then Fitch, not to mention he's probably stronger and faster too. Do I see Penn giving Rory some trouble for the first round? sure why not, Penn is great in the first round.
I have a lot of faith in Rory and Penn can surprise me like he has so many times before but I think Mac has this fight most of the time. Just as long as Penn doesn't randomly show up with a shocker again like he does randomly.