MLB Power Rankings: Phils not (ph)azed by injuries

The Philadelphia Phillies, with the best record in baseball and tops in the MLB power rankings, are good enough to substitute a raw Michael Martinez - one year removed from AA - for injured clutch hitter Placido Polanco and not miss a beat.
Phillies' Michael Martinez has done a good job filling in for infielder Placido Polanco, posting a .236 batting average in his first 50 major league games and has made only two errors, both in the outfield. ((Seth Wenig/Associated Press))
Every second Friday,'s Mike Dennis breaks down the balance of power in Major League Baseball.