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, July 19th games: The rankings from last week are in parenthesizes. 1. (1) New York Yankees - 4.31 2. (2) Texas Rangers - 4.15 3. (3) Washington Nationals - 4.07 4. (4) Cincinnati Reds - 3.90 5. (5) St. Louis Cardinals - 3.83 6. (6) Los Angeles Angels - 3.77 7. (12) Boston Red Sox - 3.63 T8. (7) Pittsburgh Pirates - 3.54 -- (8) Detroit Tigers - 3.54 -- (14) San Francisco Giants - 3.54 11. (9) Los Angeles Dodgers - 3.52 12. (11) Arizona Diamondbacks - 3.49 T13. (10) Chicago White Sox - 3.36 -- (13) Atlanta Braves - 3.36 15. (16) Oakland Athletics - 3.34 16. (15) New York Mets - 3.22 17. (17) Tampa Bay Rays - 3.19 18. (18) Milwaukee Brewers - 3.16 19. (21) Philadelphia Phillies - 3.00 20. (19) Toronto Blue Jays - 2.99 21. (20) Baltimore Orioles - 2.92 22. (25) San Diego Padres - 2.87 T23. (T22) Kansas City Royals - 2.82 -- (24) Miami Marlins - 2.82 25. (T22) Cleveland Indians - 2.80 T26. (26) Seattle Mariners - 2.67 -- (27) Chicago Cubs - 2.67 28. (28) Colorado Rockies - 2.50 29. (30) Minnesota Twins - 2.37 30. (29) Houston Astros - 2.32