He's not going to take Mike Fontenot and turn him into Chase Utley or anything, but I think he will help with the hitter's consistency, quickly finding flaws in their swings and adjusting it before it turns into a prolonged slump. Will be interesting to see what he can do with Soriano and Fukudome, 2 hitters that have been known to fall badly away from their swing mechanics from time to time. \ gerald perry and von joshua were already considered among the best hitting coaches. rudy's contribution will be negligible. The biggest thing I think Jaramillo can provide is work on technique. Both Perry and Joshua, from my understanding, focused significantly on a hitter's approach. Jaramillo, however, is more of a mechanics guy. As someone said earlier, having Jaramillo to try to keep guys like Kosuke and Soriano – who often struggle keeping their mechanics in line – using their best mechanics could be a bonus we didn't have previously. We certainly didn't lose anything, as we still have Lou teaching the OBP/patience approach. How much will improvement will that provide? I don't know, but it has the potential to be more than negligible.