I also think the two are different style hitters. I think Griffin was used to being able to pull all the pitchers he saw in high school, so that's what he did. In college, you need to be able to take what the pitcher throws and hit outside pitches to the opposite field. I think Scott Hawkins had the same issue as a freshman. I think Goulas (and Lucroy) already had the swings to handle pitches in all zones. Just my thought.