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 27

Rankings from last week are in parenthesizes.

1. (1) Oakland Athletics – 4.25

It's becoming more and more likely that Oakland will sit in the top spot for the remainder of the season.

2. (3) Washington Nationals – 3.95

A gradual rise has the Nationals, seven wins in 10 games, as the class of the National League.

3. (2) Los Angeles Dodgers – 3.91

Los Angeles has the best road record -- 34-23 -- in baseball.

4. (4) Los Angeles Angels – 3.79

With Troy Tulowitzki on the DL, Mike Trout (5.6) will soon lead the Major Leagues in WAR.

5. (5) Detroit Tigers – 3.65

The Tigers, who ranked ninth in ERA in each of the last two seasons, sit 22nd entering the week.

6. (6) Seattle Mariners – 3.63

7. (12) Milwaukee Brewers – 3.56

T8. (7) Atlanta Braves – 3.50

-- (T9) St. Louis Cardinals – 3.50

-- (11) Baltimore Orioles – 3.50

11. (T9) San Francisco Giants – 3.49

12. (8) Pittsburgh Pirates – 3.48

13. (T13) Toronto Blue Jays – 3.44

14. (15) Tampa Bay Rays – 3.42

15. (16) Cleveland Indians – 3.35

16. (T13) Cincinnati Reds – 3.31

17. (17) New York Mets – 3.22

18. (18) Boston Red Sox – 3.17

19. (19) Kansas City Royals – 3.15

20. (20) New York Yankees – 3.13

T21. (21) Miami Marlins – 3.07

-- (22) Chicago White Sox – 3.07

23. (23) San Diego Padres – 2.96

24. (24) Chicago Cubs – 2.89

25. (26) Colorado Rockies – 2.88

26. (25) Arizona Diamondbacks – 2.76

27. (27) Philadelphia Phillies – 2.67

28. (28) Minnesota Twins – 2.54

29. (29) Houston Astros – 2.44

30. (30) Texas Rangers – 2.13

 

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