Interleague play gets underway today with the first set of regional series, or at least a close approximation in some cases. I'm not sure why St. Louis plays Detroit instead of Kansas City, except that the games feature a rematch of the 2006 World Series. And since the Phillies were once called the Blue Jays, they get to play Toronto. Does the Washington-Baltimore series get broadcast on both MASN and MASN2 so fans can pick their favorite announcers?

The White Sox head north to visit the Cubs with Mark Buehrle taking the hill against Ted Lilly. We'll see if Derrek's Lee neck is healed enough to allow him to play tonight. Buehrle's kept the opposition batting average low (he threw a no-hitter, after all), but the hits he does give up tend to find the gaps. Fifteen of thirty five hits fell for extra bases. Versus both lefties and righties, Lilly's kept opposition slugging below .300.

In the Big Apple, another battle of lefties as Oliver Perez hosts Andy Pettitte. Keep your eye on the Pettitte/Delgado matchup, as lefties are hitting well against Andy this season, and Carlos is hitting better against lefties. In 2007, Perez is pitching superbly against hitters from both sides of the plate.

On the west coast, Barry Zito returns to Oakland to take the opposition mound against Chad Gaudin. Chad made the transition from reliever to starter effectively, posting a 2.93 ERA. He's pitching less than six innings per start, however, which is one reason he's 2-1 in eight starts despite a fine ERA. For his career, Zito is 51-30 at the Coliseum with a 3.66 ERA.

Enjoy!