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.  

Below are the rankings through the Thursday, August 23rd games:

The rankings from last week are in parenthesizes.

1. (1) New York Yankees – 4.13

2. (2) Washington Nationals – 4.11

3. (4) St. Louis Cardinals – 4.08

4. (3) Cincinnati Reds – 4.04

5. (5) Texas Rangers – 3.93

6. (8) Tampa Bay Rays – 3.71

7. (7) Detroit Tigers – 3.68

8. (6) Atlanta Braves – 3.63

9. (T9) Arizona Diamondbacks – 3.56

T10. (T9) Los Angeles Angels – 3.47

-- (13) San Francisco Giants – 3.47

T12. (11) Chicago White Sox – 3.46

-- (12) Los Angeles Dodgers – 3.46

14. (14) Oakland Athletics – 3.42

15. (15) Pittsburgh Pirates – 3.34

16. (16) Boston Red Sox – 3.25

17. (19) Philadelphia Phillies – 3.13

18. (18) Milwaukee Brewers – 3.12

19. (17) Baltimore Orioles – 2.98

20. (21) Kansas City Royals – 2.95

T21. (20) New York Mets – 2.92

-- (25) Seattle Mariners – 2.92

23. (22) San Diego Padres – 2.89

24. (T23) Miami Marlins – 2.85

25. (T23) Toronto Blue Jays – 2.70

26. (26) Minnesota Twins – 2.45

27. (29) Colorado Rockies – 2.40

28. (27) Chicago Cubs – 2.37

29. (28) Cleveland Indians – 2.33

30. (30) Houston Astros – 1.98