The Opsera is a statistic RealGM's Chris Reina created in order to objectively rank teams by how well they hit (OPS) and pitch (ERA). In order to determine a team's Opsera, we take their OPS, multiply that number by 10 to move the decimal point over one place to the right and then subtract the team's ERA from that number. Below are the final rankings through Thursday, May 12th's games: Last week's ranking is in parenthesizes 1. (1) St. Louis Cardinals - 4.52 The Cardinals are in first yet again, but they did lose .07 points off their Opsera, in part because of an ugly 11-4 loss to the Cubs on Wednesday. With a trip to Cincinnati and a series against Philadelphia coming up, they might finally relinquish the top spot. 2. (5) New York Yankees - 4.22 They have lost six of their last nine games, but they moved up three spots thanks to close losses. Their OPS will remain among the best, but their team ERA is bound to slide due to questions in the rotation. 3. (4) Philadelphia Phillies - 4.12 Roy Halladay and Co. are approaching baseball's best ERA and they lead all teams in wins, complete games, quality starts and fewest walks. 4. (3) Los Angeles Angels - 4.07 They ranked seventh in OPS, but losing Kendrys Morales for the entire season is going to hurt. I saw Mark Trumbo hit a ball out of Fenway Park last week, but he has an OBP of just .303. 5. (2) Cleveland Indians - 4.03 Don't look now, but the Indians are starting to come back down to earth. They have just three wins in their last eight games. 6. (6) Atlanta Braves - 4.00 If their offense continues to be below-average, the Braves could add a bat before the July 31 trade deadline and become a serious threat to the Phillies in the National League East. 7. (10) Tampa Bay Rays - 3.94 The Rays are in first place and winning 71% of the time since they began the season with six losses. 8. (9) Florida Marlins - 3.79 Imagine where the Marlins would be if Hanley Ramirez wasn't hitting .217/.308/.302 with just seven extra-base hits. 9. (7) Oakland Athletics - 3.78 They have lost Dallas Braden to injury, but the Athletics still have four starting pitchers with sub-3.30 ERAs. 10. (8) Texas Rangers - 3.56 The Rangers would be in trouble if they had traded Michael Young, who leads them with a .349 batting average, 3.84 on-base percentage and 51 hits. If Colby Lewis and Derek Holland figure things out on the mound, the division is still theirs to lose. 11. (16) San Francisco Giants - 3.54 12. (T12) Kansas City Royals - 3.40 13. (17) Cincinnati Reds - 3.32 14. (14) San Diego Padres - 3.25 15. (11) Toronto Blue Jays - 3.18 16. (T12) Colorado Rockies - 3.16 17. (18) New York Mets - 3.09 18. (15) Milwaukee Brewers - 3.03 19. (23) Detroit Tigers - 3.01 20. (T20) Pittsburgh Pirates - 2.94 21. (T20) Boston Red Sox - 2.93 22. (19) Arizona Diamondbacks - 2.91 23. (27) Chicago White Sox - 2.86 24. (26) Los Angeles Dodgers - 2.71 25. (22) Washington Nationals - 2.63 26. (25) Chicago Cubs - 2.62 27. (24) Seattle Mariners - 2.45 28. (28) Baltimore Orioles - 2.30 29. (29) Houston Astros - 1.93 30. (30) Minnesota Twins - 1.31