Re: Who will have the better career: Jason Heyward or Jay Bruce?
I voted Bruce, but if I really had to bet, I'd say Heyward. Making the majors (deservedly so) at such a young age is a pretty big indicator of future success.
Games are won on run differential -- scoring more than your opponent. Runs are runs, scored or prevented they all count the same. Worry about scoring more and allowing fewer, not which positions contribute to which side of the equation or how "consistent" you are at your current level of performance.