If you go to baseballprospectus.com, which is a graet baseball site anyway, you can click on "Five new stat reports" on the left side, then go down to "Postseason Odds Report." The column titled "SOS" is Strength of Schedule.
Minnesota's SOS is .456.
The Cubs' SOS is .458.
Another cool thing about the chart is the calculated % chance of each team making the playoffs, updated daily.
Roger Angell: I was talking with Bob Gibson and I said: 'Are you always this competitive?' He said: 'Oh, I think so. I got a three-year old daughter, and I've played about 500 games of tic-tac-toe with her and she hasn't beat me yet.'