After one week of the regular season, the top three teams in our rankings remain unchanged from the preseason, with the Chicago Cubs, Kansas City Royals and San Francisco Giants occupying the top spots. The Pittsburgh Pirates and Los Angeles Dodgers each moved up a number of spots to round out the top five.
The Baltimore Orioles, MLB's last undefeated team, made the biggest jump up in the rankings, moving from No. 23 all the way to No. 11. With teams in front of them struggling, they could be even higher next week.