I mean anything's possible but I doubt it. Its not like he could just go out there and control Pac with just his jab and some movement like he did against Juarez. You can't compare Juarez and Pac, its questionable at times whether Juarez is even conscious, not to mention Pac's so much faster of hand and foot. Barrera would have to box and move and jab but he'd also have to get Pac's respect. Would have to be almost a perfect performance. But I doubt it happens anyway.