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 30th games:

The rankings from last week are in parenthesizes.

1. (1) New York Yankees – 4.13

2. (2) Washington Nationals – 4.06

3. (4) Cincinnati Reds – 4.01

4. (5) Texas Rangers – 3.98

5. (3) St. Louis Cardinals – 3.92

T6. (6) Tampa Bay Rays – 3.69

-- (7) Detroit Tigers – 3.69

8. (8) Atlanta Braves – 3.62

9. (14) Oakland Athletics – 3.55

10. (T10) Los Angeles Angels – 3.47

11. (T10) San Francisco Giants – 3.44

12. (9) Arizona Diamondbacks – 3.43

13. (T12) Chicago White Sox – 3.42

14. (T12) Los Angeles Dodgers – 3.41

15. (15) Pittsburgh Pirates – 3.39

16. (18) Milwaukee Brewers – 3.26

17. (16) Boston Red Sox – 3.18

18. (17) Philadelphia Phillies – 3.16

19. (19) Baltimore Orioles – 3.08

20. (23) San Diego Padres – 3.04

21. (T21) New York Mets – 2.99

22. (20) Kansas City Royals – 2.96

23. (T21) Seattle Mariners – 2.84

24. (24) Miami Marlins – 2.83

25. (25) Toronto Blue Jays – 2.68

26. (27) Colorado Rockies – 2.47

27. (26) Minnesota Twins – 2.43

28. (28) Chicago Cubs – 2.32

29. (29) Cleveland Indians – 2.24

30. (30) Houston Astros – 2.00