Rettenmund 's emphasis was on making sure his batters properly loaded their weight and had a very rhythmic swing through the hitting zone .
One of Brosius ' hitting coaches was Merv Rettenmund , a former major league outfielder for 13 seasons .
league outfielder 's emphasis was on making sure Merv Rettenmund 's batters properly loaded their weight and had a very rhythmic swing through the hitting zone .
One of Brosius ' hitting coaches was Merv Rettenmund , a former major league outfielder for 13 seasons .