Filed under: UFCThe main event for UFC 137 may have seen its share of tweaking, but it’s not the only fight on this card with high stakes. Several fighters on Saturday night’s lineup could be just one loss away from unemployment, and one or two could even be facing retirement if they can’t pull out a win. Who are they, and what are their chances for crafting a brighter future for themselves in Las Vegas this weekend? For answers, we turn to the Cut List. Roy Nelson (15-6, 2-2 UFC) Who he’s facin…