More baseball bets before the season starts:

Chicago White Sox under 87.5 wins

In 2005, they won 99 games with great pitching and mediocre hitting.
In 2006, they won 90 games with great hitting and medicocre pitching.

In 2007, their offense will regress back toward the mean (especially if Scott Podsednik and Darin Erstad play everyday), and I don't see their pitching being able to make up the difference.

Arizona Diamondbacks over 78.5 wins
Arizona Diamondbacks win NL West

If I had to pick a team that would be this year's Detroit Tigers, it would be the Diamondbacks. They have a lot of good young hitters, a solid rotation led by Brandon Webb and Randy Johnson, and a competent management team.

Baseball Prospectus expects this team to contend for the NL West title, and their odds of winning the division have shrunk from 7-1 to 7-2 in the last few weeks because of that.

Los Angeles Dodgers under 88.5 wins
Takashi Saito under 35.5 saves

The Dodgers had one of the best offenses in the NL last year, but I don't see how they're going to repeat that if they choose to play Juan Pierre and Luis Gonzalez over more talented players like Matt Kemp. Randy Wolf and Brett Tomko don't inspire much confidence at the back of the rotation.

I'm not confident Saito will finish the season as the Dodger closer. The NL might be able to catch up to him in his 2nd year in the league, and the Dodgers have a closer-in-waiting in Jonathan Broxton in case Saito isn't as dominant this year.