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, July 20

Rankings from last week are in parenthesizes.

1. (1) Oakland Athletics – 4.18

The Athletics lead a division with three teams at least six games over .500. Even Seattle would be within two games, in the win column, from first place in any other division.

2. (2) Los Angeles Dodgers – 3.94

Yasiel Puig has contributed a team-best 3.4 WAR to the Dodgers in 2014.

3. (3) Washington Nationals – 3.93

Washington has maintained the best ERA (3.10) in baseball despite nothing spectacular from Stephen Strasburg (3.55) and Gio Gonzalez (3.74).

4. (5) Los Angeles Angels – 3.80

The Angels continue to chase the first-place A's. They have the second-best record in the Major Leagues.

5. (4) Detroit Tigers – 3.72

Detroit has been average as of late, but still have more than a five-game edge in the American League Central.

6. (6) Seattle Mariners – 3.61

7. (T8) Atlanta Braves – 3.54

8. (13) Pittsburgh Pirates – 3.53

T9. (T11) San Francisco Giants – 3.52

-- (T11) St. Louis Cardinals – 3.52

11. (7) Baltimore Orioles – 3.47

12. (T8) Milwaukee Brewers – 3.44

T13. (10) Cincinnati Reds – 3.43

-- (14) Toronto Blue Jays – 3.43

15. (17) Tampa Bay Rays – 3.34

16. (16) Cleveland Indians – 3.33

17. (15) New York Mets – 3.28

18. (19) Boston Red Sox – 3.21

19. (18) Kansas City Royals – 3.10

20. (21) New York Yankees – 3.08

21. (20) Miami Marlins – 2.98

22. (22) Chicago White Sox – 2.96

23. (24) San Diego Padres – 2.95

24. (23) Chicago Cubs – 2.88

25. (28) Arizona Diamondbacks – 2.76

26. (25) Colorado Rockies – 2.75

27. (T26) Philadelphia Phillies – 2.68

28. (T26) Minnesota Twins – 2.62

29. (29) Houston Astros – 2.56

30. (30) Texas Rangers – 2.10

 

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