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 the end of the regular season.

Rankings from last week are in parenthesizes.

1. (1) Detroit Tigers – 4.19

2. (2) Boston Red Sox – 4.16

3. (3) Atlanta Braves – 4.05

4. (4) Los Angeles Dodgers – 3.97

5. (6) St. Louis Cardinals – 3.91

6. (7) Oakland Athletics – 3.89

7. (8) Pittsburgh Pirates – 3.83

8. (5) Cincinnati Reds – 3.80

9. (9) Texas Rangers – 3.73 

10. (10) Tampa Bay Rays – 3.63

11. (13) Cleveland Indians – 3.55

12. (11) Washington Nationals – 3.51

13. (12) Kansas City Royals – 3.49

T14. (15) Baltimore Orioles – 3.24

-- (17) Milwaukee Brewers – 3.24

16. (14) Arizona Diamondbacks – 3.23

17. (16) Los Angeles Angels – 3.20

18. (19) Toronto Blue Jays – 3.04

19. (20) San Francisco Giants – 3.02

20. (18) Colorado Rockies – 2.97

21. (22) New York Mets – 2.95

22. (21) Chicago Cubs – 2.93

23. (23) New York Yankees – 2.89

24. (T24) San Diego Padres – 2.88

25. (T24) Chicago White Sox – 2.82

26. (27) Seattle Mariners – 2.64

27. (26) Philadelphia Phillies – 2.58

28. (29) Miami Marlins – 2.56

29.(28) Minnesota Twins – 2.37

30. (30) Houston Astros – 1.95