By Andrew Perna 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. Below are the rankings through the Thursday, June 21st games: The rankings from last week are in parenthesizes. 1. (1) Texas Rangers - 4.44 2. (5) New York Yankees - 4.18 3. (3) Washington Nationals - 3.98 4. (2) Los Angeles Dodgers - 3.93 5. (4) St. Louis Cardinals - 3.89 6. (10) Los Angeles Angels - 3.78 7. (7) Cincinnati Reds - 3.76 8. (6) San Francisco Giants - 3.52 9. (9) Tampa Bay Rays - 3.48 10. (8) Baltimore Orioles - 3.47 T11. (12) Boston Red Sox - 3.45 -- (13) Arizona Diamondbacks - 3.45 13. (18) Detroit Tigers - 3.44 14. (11) Chicago White Sox - 3.32 T15. (T14) Philadelphia Phillies - 3.25 -- (T14) Toronto Blue Jays - 3.25 17. (T14) Atlanta Braves - 3.22 18. (19) Pittsburgh Pirates - 3.18 T19. (20) New York Mets - 3.14 -- (22) Milwaukee Brewers - 3.14 21. (T23) Oakland Athletics - 3.10 22. (21) Kansas City Royals - 3.07 23. (26) Cleveland Indians - 2.66 24. (17) Miami Marlins - 2.57 25. (T27) Chicago Cubs - 2.51 26. (T27) San Diego Padres - 2.50 27. (25) Seattle Mariners - 2.46 T28. (T23) Houston Astros - 2.42 -- (29) Colorado Rockies - 2.42 30. (30) Minnesota Twins - 2.07