[Diamond]

Rule 3.02 states that, "No player shall intentionally discolor or damage the ball by rubbing it with soil, rosin, paraffin, licorice, sand-paper, emery-paper or other foreign substance."

Rule 8.02 states that a pitcher "shall not" even deliver a ball that he defaces with spit or a foreign substance or by rubbing the ball on his glove, person or clothing.

The penalty for both violations is ejection.

Screen captures from FOX's telecast of Sunday's Game 2 of the World Series show before and after images of Tiger pitcher Kenny Rogers' left hand. (FOX Sports)

[TankerKC]

Two notes:

In the first inning photo, there seems to be some "dirt" on the ball too.
In the second inning photo, you can still see where the "dirt" was.

That's some sticky dirt.

Disclaimer: I am a Cards fan, and I think the dirt had no play in the outcome of the game.

[RightFighter]

The interesting thing about that split-screen picture is the ball. Look at how the "substance" is all over the ball. Also, notice how shiny the "substance" is. It's not dirt, and it's not sweat in that cold weather either.