By Andrew Perna 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 5th’s games: Last week’s ranking is in parenthesizes 1. (1) St. Louis Cardinals – 4.59 The Cardinals have been boosted by Matt Holliday (.417) and Lance Berkman (.392), who have the two highest batting averages in all of baseball. The pitching of Kyle Lohse – 4-1 with a 2.44 ERA – helped as well. 2. (3) Cleveland Indians – 4.37 The Indians are still red-hot, actually jumping a stop from last week’s ranking. Only three teams have scored more runs than Cleveland this season. 3. (4) Los Angeles Angels – 4.29 Jered Weaver finally suffered his first loss of the season against the Red Sox this week, but he’s still 6-1 with 55 strikeouts and a 1.39 ERA. Howie Kendrick has been instrumental as well. He’s hitting .305 with six home runs and 14 RBI. 4. (9) Philadelphia Phillies – 4.25 Pitching is the name of the game, but Placido Polando has unexpectedly bolstered the offense. The infielder has 21 RBI and a .418 OBP. 5. (2) New York Yankees – 4.17 A trio of Yankees – Mark Teixeira, Curtis Granderson and Robinson Cano – have eight home runs (only four Major League players have more), but there have been times when the offense has been shut down. New York scored just 10 runs in a four-game series against Detroit this week. 6. (10) Atlanta Braves – 4.02 Despite some off-field drama, the Braves won five straight heading into Friday night’s game against the Phillies. 7. (8) Oakland Athletics – 3.93 It’s still all pitching for the Athletics, who could slide up in these rankings if they make a play for a hitter prior to July’s trade deadline. They have had the lowest ERA (2.66) in all of baseball for a majority of the season. 8. (T6) Texas Rangers – 3.85 Where would the Rangers be if Neftali Feliz, Nelson Cruz and Josh Hamilton weren’t injured? 9. (5) Florida Marlins – 3.74 Josh Johnson has just three victories despite a sparkling 1.68 ERA. Florida has scored 17 runs in his wins (three games) and 17 in his loss and no-decisions (four games). 10. (11) Tampa Bay Rays – 3.55 On April 10, the Rays were 1-8. Since then they have gone 16-6 and five of those six losses have come by three or fewer runs. 11. (12) Toronto Blue Jays – 3.43 12. (22) Kansas City Royals – 3.40 -- (13) Colorado Rockies – 3.40 14. (16) San Diego Padres – 3.29 15. (T6) Milwaukee Brewers – 3.25 16. (15) San Francisco Giants – 3.12 17. (14) Cincinnati Reds – 3.04 18. (18) New York Mets – 2.88 19. (20) Arizona Diamondbacks – 2.85 20. (19) Boston Red Sox – 2.81 -- (21) Pittsburgh Pirates – 2.81 22. (17) Washington Nationals – 2.80 23. (25) Detroit Tigers – 2.66 24. (24) Seattle Mariners – 2.61 25. (27) Chicago Cubs – 2.60 26. (23) Los Angeles Dodgers – 2.51 27. (26) Chicago White Sox – 2.41 28. (28) Baltimore Orioles – 2.11 29. (29) Houston Astros – 2.08 30. (30) Minnesota Twins – 1.42