If he was sitting Vaughn for a league average left fielder then I don't think we'd be having this conversation. Hell if Engel was healthy most of this board would be good with him starting in LF (or RF). But he's sitting him for the likes of Nick Williams (sucks), Leury Garcia (who is fine as a bench player, but obviously is exposed with the increase of playing time), and Jake Lamb (who is a third baseman AND sucks). None of those three options are STARTING leftfielders in the big leagues and we don't expect Vaughn to be, but we do expect him to be a major league hitter. If he somehow becomes an adequate OF then you just hit the jack pot.