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 final rankings through the Thursday, August 25th games: The rankings from last week are in parenthesizes. 1. (1) New York Yankees - 4.42 Thanks to three grand slams (a record) on Thursday, New York has the highest OPS (.806) in baseball. 2. (4) Boston Red Sox - 4.19 Boston took three out of four from Texas, allowing them to swap spots with the Rangers in our rankings. 3. (3) Philadelphia Phillies - 4.17 Who would have thought that Vance Worley could be the fourth Philadelphia pitcher with double-digit wins? He recorded his ninth win on Tuesday against the Mets. 4. (2) Texas Rangers - 3.88 The Rangers once-insurmountable lead in the American League West is now just two games over the Angels with a weekend series on tap. 5. (7) Atlanta Braves - 3.78 The young relievers of the Braves will be a nice postseason story this October. 6. (5) St. Louis Cardinals - 3.71 The Brewers have left the Cardinals in the dust and they are open to waiver trades as the August 31 deadline nears. 7. (6) Milwaukee Brewers - 3.69 Believe it or not, Milwaukee could still catch Philadelphia for home field advantage throughout the playoffs. 8. (10) Los Angeles Angels - 3.58 On life support just a few weeks ago, the Angels have kept the Rangers from going on autopilot. 9. (9) Tampa Bay Rays - 3.54 The Rays could hang with the Yankees and Red Sox in 2012 if they add some above-average bats this winter. 10. (8) San Francisco Giants - 3.45 The defending-champions are falling out of playoff contention. Luckily, they have six games left against the Diamondbacks to jump back into the race. 11. (T14) Detroit Tigers - 3.38 12. (T11) Cincinnati Reds - 3.29 13. (13) Arizona Diamondbacks - 3.26 14. (T11) Chicago White Sox - 3.25 T15. (19) Washington Nationals - 3.21 -- (T20) San Diego Padres - 3.21 T17. (T14) Toronto Blue Jays - 3.20 -- (22) Los Angeles Dodgers - 3.20 19. (17) Oakland Athletics - 3.17 20. (T20) Colorado Rockies - 3.13 21. (16) Cleveland Indians - 3.09 22. (18) New York Mets - 3.05 23. (24) Pittsburgh Pirates - 2.94 24. (23) Florida Marlins - 2.88 25. (25) Kansas City Royals - 2.76 26. (26) Chicago Cubs - 2.71 27. (27) Seattle Mariners - 2.67 28. (28) Baltimore Orioles - 2.45 29. (30) Houston Astros - 2.31 30. (29) Minnesota Twins - 2.14