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, September 14.

Rankings from last week are in parenthesizes.

1. (1) Washington Nationals – 4.05

The Nationals are the team to beat in the National League thanks to their +118 run differential.

2. (2) Los Angeles Dodgers – 4.02

Washington may have a slightly better record, but who wants to face Clayton Kershaw and Zack Greinke in the first two games of a playoff series?

3. (5) Baltimore Orioles – 3.86

Nelson Cruz, who signed a one-year, $8 million deal after a controversial 2013 season, is having the best effort of his career. The 34-year-old is hitting .263/.331/.526 with 39 home runs and 102 RBI.

4. (6) Los Angeles Angels – 3.85

The Angels are red-hot and have left the once-infallible Athletics in the dust.

5. (3) Oakland Athletics – 3.83

Oakland must fight off a handful of teams for a Wild Card berth after cruising for a majority of the season.

6. (4) Seattle Mariners – 3.77

7. (7) Pittsburgh Pirates – 3.76

8. (10) Detroit Tigers – 3.60

9. (8) San Francisco Giants – 3.58

10. (9) Cleveland Indians – 3.49

11. (16) Toronto Blue Jays – 3.41

12. (14) Milwaukee Brewers – 3.40

T13. (11) Atlanta Braves – 3.39

-- (12) Tampa Bay Rays – 3.39

-- (15) St. Louis Cardinals – 3.39

16. (13) Kansas City Royals – 3.35

17. (17) Miami Marlins – 3.20

18. (18) New York Yankees – 3.14

19. (19) New York Mets – 3.13

20. (22) Cincinnati Reds – 3.08

21. (20) San Diego Padres – 3.02

22. (21) Chicago Cubs – 2.89

23. (23) Philadelphia Phillies – 2.86

24. (24) Boston Red Sox – 2.82

25. (26) Chicago White Sox – 2.79

26. (25) Colorado Rockies – 2.77

27. (27) Houston Astros – 2.72

28. (28) Arizona Diamondbacks – 2.59

29. (29) Minnesota Twins – 2.50

30. (30) Texas Rangers – 2.21

 

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