Re: Cardinals, Bluejays to swap Rolen, Glaus
If they're both 100% healthy, Rolen is the better player. But he's not and I wouldn't be surprised if never plays 140+ games again. Cardinals get more reliable offense. Blue Jays get more defense. A surprising non-starter for a deal with 2 big names.
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.