The Opsera is a statistic RealGM Executive Editor Chris Reina created in order to objectively rank teams by how well they hit (OPS) and pitch (ERA). 

In order to determine the Opsera rating for each, we take their OPS, multiply that number by 10 to move the decimal point over one place to the right and then subtract their ERA from that number.  

All statistics are through Sunday, June 15.

Rankings from last week are in parenthesizes.

1. (1) Oakland Athletics – 4.52

The Athletics (+132) have a higher run differential than all five other American League clubs with positive differentials combined (+114).

2. (2) Washington Nationals – 3.94

They ended last week with a four-game skid, but sit just a game back of the Braves in the National League East.

3. (3) San Francisco Giants – 3.89

The Giants have baseball's best record, but the Rockies flexed their muscles this weekend with a three-game sweep in San Francisco.

4. (4) Los Angeles Dodgers – 3.88

Los Angeles has gone 22-14 on the road, but a disappointing 15-20 at Dodger Stadium.

5. (6) Toronto Blue Jays – 3.72

The Blue Jays are eleven games over .500 and lead the AL East by more than four games. Toronto may enjoy it's first-ever NBA/MLB division title combination ever.

6. (7) Milwaukee Brewers – 3.63

7. (9) St. Louis Cardinals – 3.59

8. (10) Detroit Tigers – 3.56

9. (5) Atlanta Braves – 3.55

10. (11) Los Angeles Angels – 3.51

11. (15) Pittsburgh Pirates – 3.47

T12. (8) Miami Marlins – 3.39

-- (12) Colorado Rockies – 3.39

T14. (14) Seattle Mariners – 3.25

-- (16) Boston Red Sox – 3.25

16. (19) Baltimore Orioles – 3.23

17. (T17) Cincinnati Reds – 3.20

18. (13) Cleveland Indians – 3.18

T19. (T17) Chicago Cubs – 3.10

-- (23) Kansas City Royals – 3.10

21. (T20) New York Mets – 2.95

22. (T20) New York Yankees – 2.94

23. (T25) Houston Astros – 2.92

24. (28) Tampa Bay Rays – 2.83

25. (22) Chicago White Sox – 2.82

26. (29) Philadelphia Phillies – 2.75

27. (27) Arizona Diamondbacks – 2.70

28. (T25) San Diego Padres – 2.68

29. (24) Texas Rangers – 2.67

30. (30) Minnesota Twins – 2.64

 

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