Love that a "Bureau" actually did research on this . . .
The Elias Sports Bureau followed the careers of three professional athletes to see if shaving routinely improved the way they played. The players in question: Johnny Damon, Freddy Garcia and Swisher.
The results: Damon averaged nine more stolen bases clean-shaven, and nearly all of his career highs have come beardless; Garcia's career ERA with facial hair is 4.34, shaved it is reduced to 3.60; and Swisher also has better numbers when clean shaven.
There you have it.