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, April 13.

Rankings from the end of the 2013 regular season are in parenthesizes.

1. (17) Milwaukee Brewers – 5.71

It's no surprise the Brewers hold the top spot in our first rankings of the season. They've won nine straight, including 6-0 on the road, and have the lowest ERA (1.80) in baseball.

2. (7) Oakland Athletics – 4.89

Sonny Gray has a 0.95 ERA and 19 strikeouts in 19 innings pitched (three starts).

3. (3) Atlanta Braves – 4.67

A long-term deal hasn't ruined Freddie Freeman's drive. He's hitting .442/.519/.814 with four home runs and 10 RBI through 12 games.

4. (4) Los Angeles Dodgers – 4.23

Zack Greinke is nice to have when Clayton Kershaw is hurting. The right-hander has a 2.76 ERA, 1.10 WHIP and 21 strikeouts in 16.1 innings (three starts).

5. (11) Washington Nationals – 4.22

All five of Washington's losses have come against Atlanta in the early going.

6. (27) Seattle Mariners – 3.88

Robinson Cano has the Mariners in contention -- for now. The second baseman is hitting .333/.417/.381 without a home run in 11 games.

7. (20) San Francisco Giants – 3.82

The Giants have a .751 OPS, good for eighth in the game. Brandon Belt's five home runs (.577 slugging) have paced the offense.

T8. (10) Tampa Bay Rays – 3.56

If they decide to trade David Price, Chris Archer may be ready to assume his place atop the rotation. The young righty has a 1.38 ERA, 1.08 WHIP and 11 strikeouts in 13 innings.

-- (16) Los Angeles Angels – 3.56

Pujols has three home runs after hitting just 17 all of last season, but he still has a troubling slash line .240/.309/.500.

10. (1) Detroit Tigers – 3.54

Rajai Davis has been an underrated addition to the Tigers. He has five steals for the slow-footed club and is hitting .345/.412/.448 in eight games.

11. (26) Philadelphia Phillies – 3.47

12. (8) Pittsburgh Pirates – 3.45

13. (23) New York Yankees – 3.44

14. (5) Cincinnati Reds – 3.43

15. (19) Toronto Blue Jays – 3.33

16. (29) Miami Marlins – 3.30

17. (2) Boston Red Sox – 3.19

18. (18) Colorado Rockies – 3.15

19. (T24) San Diego Padres – 3.13

20. (12) Kansas City Royals – 2.78

21. (6) St. Louis Cardinals – 2.77

22. (T24) Chicago White Sox – 2.68

23. (13) Cleveland Indians – 2.67 

24. (9) Texas Rangers – 2.58

25. (21) Chicago Cubs – 2.50

26. (15) Baltimore Orioles – 2.38

27. (28) Minnesota Twins – 1.95

28. (30) Houston Astros – 1.80

29. (22) New York Mets – 1.13

30. (14) Arizona Diamondbacks – 1.12

 

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